2020-11-18 19:16:00

64 files changed, 9440 insertions, 781 deletions

diff --git a/tex/context/base/mkii/cont-new.mkii b/tex/context/base/mkii/cont-new.mkii
index e05ed3bf3..5a4a8adf0 100644
--- a/tex/context/base/mkii/cont-new.mkii
+++ b/tex/context/base/mkii/cont-new.mkii
@@ -11,7 +11,7 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-\newcontextversion{2020.11.17 12:39}
+\newcontextversion{2020.11.18 19:13}
 
 %D This file is loaded at runtime, thereby providing an
 %D excellent place for hacks, patches, extensions and new
diff --git a/tex/context/base/mkii/context.mkii b/tex/context/base/mkii/context.mkii
index c93f19509..a78367225 100644
--- a/tex/context/base/mkii/context.mkii
+++ b/tex/context/base/mkii/context.mkii
@@ -20,7 +20,7 @@
 %D your styles an modules.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2020.11.17 12:39}
+\edef\contextversion{2020.11.18 19:13}
 
 %D For those who want to use this:
 
diff --git a/tex/context/base/mkiv/chem-str.mkxl b/tex/context/base/mkiv/chem-str.mkxl
index 29b112c0e..5274de949 100644
--- a/tex/context/base/mkiv/chem-str.mkxl
+++ b/tex/context/base/mkiv/chem-str.mkxl
@@ -111,8 +111,8 @@
 
 % size (small medium big)
 
-\edef\chemicaltoplocation{t}
-\edef\chemicalbotlocation{b}
+% \edef\chemicaltoplocation{t}
+% \edef\chemicalbotlocation{b}
 
 \permanent\protected\def\chemicaltext#1%
   {\mathematics
@@ -248,9 +248,9 @@
 % kind of compatible, but text sizes instead of math sizes (i.e. tx is larger than scriptsize)
 
 \appendtoks
-   \edef\chemicalbodyfont{\chemicalparameter\c!bodyfont}% public?
-   \ifempty\chemicalbodyfont
-     \switchtobodyfont[\chemicalbodyfont]%
+   \edef\m_bodyfont{\chemicalparameter\c!bodyfont}%
+   \ifempty\m_bodyfont
+     \switchtobodyfont[\m_bodyfont]%
    \fi
    \getvalue{\??chemicalsize\chemicalparameter\c!size}%
 % \to \everystructurechemical
@@ -351,14 +351,14 @@
    \box\scratchboxtwo
    \egroup}
 
-\protected\def\chemicalleft#1#2% redundant boxes thanks to visual
+\permanent\protected\def\chemicalleft#1#2% redundant boxes thanks to visual
   {\hbox\bgroup % hpack ?
    \setstrut
    \llap{\chem_box_visual_nop{\strut#1}}%
    \chem_box_visual_nop{\strut#2}%
    \egroup}
 
-\protected\def\chemicalright#1#2% redundant boxes thanks to visual
+\permanent\protected\def\chemicalright#1#2% redundant boxes thanks to visual
   {\hbox\bgroup % hpack ?
    \setstrut
    \chem_box_visual_yes{\strut#2}%
diff --git a/tex/context/base/mkiv/cont-new.mkiv b/tex/context/base/mkiv/cont-new.mkiv
index 74eb639aa..b55138767 100644
--- a/tex/context/base/mkiv/cont-new.mkiv
+++ b/tex/context/base/mkiv/cont-new.mkiv
@@ -13,7 +13,7 @@
 
 % \normalend % uncomment this to get the real base runtime
 
-\newcontextversion{2020.11.17 12:39}
+\newcontextversion{2020.11.18 19:13}
 
 %D This file is loaded at runtime, thereby providing an excellent place for hacks,
 %D patches, extensions and new features. There can be local overloads in cont-loc
diff --git a/tex/context/base/mkiv/context.mkiv b/tex/context/base/mkiv/context.mkiv
index de68f0d2f..bd7941cf1 100644
--- a/tex/context/base/mkiv/context.mkiv
+++ b/tex/context/base/mkiv/context.mkiv
@@ -45,7 +45,7 @@
 %D {YYYY.MM.DD HH:MM} format.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2020.11.17 12:39}
+\edef\contextversion{2020.11.18 19:13}
 
 %D Kind of special:
 
diff --git a/tex/context/base/mkiv/context.mkxl b/tex/context/base/mkiv/context.mkxl
index 07dd01ae5..4a2ea9d5d 100644
--- a/tex/context/base/mkiv/context.mkxl
+++ b/tex/context/base/mkiv/context.mkxl
@@ -29,7 +29,7 @@
 %D {YYYY.MM.DD HH:MM} format.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2020.11.17 12:39}
+\edef\contextversion{2020.11.18 19:13}
 
 %overloadmode 1 % check frozen / warning
 %overloadmode 2 % check frozen / error
@@ -223,7 +223,7 @@
 \loadmkxlfile{colo-grp} % optional
 \loadmkxlfile{colo-ext}
 
-\loadmarkfile{node-bck} % overloads anch-pgr (experimental and undocumented)
+\loadmkxlfile{node-bck} % overloads anch-pgr (experimental and undocumented)
 
 \loadmarkfile{pack-cut}
 
@@ -245,22 +245,22 @@
 \loadmarkfile{pack-fen}
 
 \loadmkxlfile{lxml-ini}
-\loadmarkfile{lxml-sor}
+\loadmkxlfile{lxml-sor}
 
 \loadmkvifile{typo-prc}
 \loadmkivfile{typo-plc}
 
 \loadmklxfile{strc-ini}
-\loadmarkfile{strc-tag}
+\loadmkxlfile{strc-tag}
 \loadmkxlfile{strc-doc}
 \loadmkxlfile{strc-num}
 \loadmkxlfile{strc-mar}
 \loadmkxlfile{strc-sbe}
-\loadmkvifile{strc-lst}
+\loadmklxfile{strc-lst}
 \loadmkxlfile{strc-sec}
 \loadmkxlfile{strc-pag} % hm, depends on core-num
-\loadmarkfile{strc-ren}
-\loadmarkfile{strc-xml}
+\loadmkxlfile{strc-ren}
+%loadmarkfile{strc-xml}
 \loadmarkfile{strc-def} % might happen later
 \loadmklxfile{strc-ref}
 %loadmarkfile{strc-reg}
@@ -288,7 +288,7 @@
 \loadmklxfile{strc-des}
 \loadmklxfile{strc-enu}
 
-\loadmarkfile{strc-ind}
+\loadmkxlfile{strc-ind}
 \loadmkxlfile{strc-lab}
 \loadmkxlfile{strc-syn}
 
@@ -359,9 +359,9 @@
 
 \loadmarkfile{page-com} % optional (after scrn-pag)
 
-\loadmarkfile{strc-bkm} % bookmarks
+\loadmkxlfile{strc-bkm} % bookmarks
 
-\loadmarkfile{java-ini}
+\loadmkxlfile{java-ini}
 
 \loadmkvifile{scrn-fld}
 \loadmkvifile{scrn-hlp}
@@ -378,7 +378,7 @@
 \loadmklxfile{font-sty}
 \loadmkvifile{font-set}
 \loadmklxfile{font-emp}
-\loadmarkfile{font-pre}
+\loadmkxlfile{font-pre}
 \loadmarkfile{font-unk}
 \loadmkxlfile{font-tra}
 \loadmkxlfile{font-chk}
@@ -392,7 +392,7 @@
 \loadmarkfile{typo-par} % par builders (uses fonts)
 
 \loadmkxlfile{tabl-com}
-\loadmarkfile{tabl-pln}
+%loadmarkfile{tabl-pln}
 
 \loadmkxlfile{tabl-tab} % thrd-tab stripped and merged
 
@@ -401,13 +401,13 @@
 \loadmkxlfile{tabl-nte}
 \loadmkxlfile{tabl-ltb}
 \loadmkxlfile{tabl-frm}
-\loadmarkfile{tabl-tsp}
+\loadmkxlfile{tabl-tsp}
 \loadmklxfile{tabl-xtb}
-\loadmarkfile{tabl-mis}
+\loadmkxlfile{tabl-mis}
 
 \loadmkxlfile{typo-lan}
 
-\loadmarkfile{lxml-css}
+\loadmkxlfile{lxml-css}
 
 \loadmkxlfile{spac-chr} % depends on fonts
 
@@ -479,7 +479,6 @@
 \loadmarkfile{math-for}
 \loadmarkfile{math-def} % also saves some meanings
 \loadmkxlfile{math-ali}
-%loadmarkfile{math-arr}
 \loadmklxfile{math-stc}
 \loadmkxlfile{math-frc}
 \loadmarkfile{math-mis}
@@ -494,7 +493,7 @@
 %loadmarkfile{math-lan}
 \loadmkxlfile{math-toy}
 
-\loadmarkfile{strc-mat}
+\loadmkxlfile{strc-mat}
 
 \loadmkxlfile{chem-ini}
 \loadmkxlfile{chem-str}
@@ -502,13 +501,13 @@
 \loadmkxlfile{typo-scr}
 \loadmkxlfile{phys-dim}
 
-\loadmarkfile{node-rul} % beware, defined \underbar so after math
+\loadmkxlfile{node-rul} % beware, defined \underbar so after math
 \loadmklxfile{font-sol} % font solutions
 
 \loadmklxfile{strc-not}
-\loadmkvifile{strc-lnt}
-\loadmkivfile{strc-tnt}
-\loadmkivfile{strc-usr}
+\loadmklxfile{strc-lnt}
+\loadmkxlfile{strc-tnt}
+\loadmkxlfile{strc-usr}
 
 \loadmkxlfile{pack-com}
 \loadmkxlfile{typo-del}
@@ -549,8 +548,6 @@
 
 \loadmarkfile{cont-log}
 
-% \loadmarkfile{task-ini}
-
 \loadmkxlfile{cldf-ver} % verbatim, this can come late
 \loadmkxlfile{cldf-com} % commands, this can come late
 
@@ -580,7 +577,7 @@
 \loadmarkfile{math-inc} % an experiment
 \loadmkxlfile{publ-inc} % an experiment
 
-\loadmarkfile{task-ini}
+\loadmkxlfile{task-ini}
 
 \loadmarkfile{syst-cmp} % compatibility stuff moved here
 
diff --git a/tex/context/base/mkiv/font-ini.mklx b/tex/context/base/mkiv/font-ini.mklx
index cdd89c5d0..75db6e276 100644
--- a/tex/context/base/mkiv/font-ini.mklx
+++ b/tex/context/base/mkiv/font-ini.mklx
@@ -612,7 +612,7 @@
 
 \def\font_basics_check_text_bodyfont_step#whatever#body% size can be empty (checking needed as \bf is already defined)
   {\ifcsname#whatever\endcsname\else
-     \setugvalue{#whatever}{#body}%
+     \permanent\setugvalue{#whatever}{#body}%
    \fi}
 
 \def\font_basics_check_text_bodyfont#style#alternative#size% size can be empty (checking needed as \bf is already defined)
diff --git a/tex/context/base/mkiv/font-pre.mkxl b/tex/context/base/mkiv/font-pre.mkxl
new file mode 100644
index 000000000..8468fbbd7
--- /dev/null
+++ b/tex/context/base/mkiv/font-pre.mkxl
@@ -0,0 +1,999 @@
+%D \module
+%D   [       file=font-pre,
+%D        version=2012.01.04, % moved from font-ini
+%D          title=\CONTEXT\ Font Macros,
+%D       subtitle=Predefined,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Font Macros / Predefined}
+
+\unprotect
+
+%D A basic set of features is defined here.
+
+% beware, base mode + dynamics can give weird effects
+
+% frac : with numr dnom
+%
+% vkrn valt vert vrt2 vpal : when vertical
+%
+% rtlm rtla : in r2l runs
+% ltrm ltra : in l2r runs
+%
+% rvrn : variable fonts
+%
+% rtbd lfbd : opbd
+%
+% rkrf rphf vatu vjmo tjmo rclt psts pstf ljmo haln
+% pres pref nukt
+% abvs abvm blwm blws cjct blwf akhn (indic)
+% half
+% abvf cfar (khmer)
+%
+% ccmp locl calt clig liga rlig
+%
+% mkmk mark kern (palt pwid) curs (by choice but some fonts need it)
+%
+% init medi isol fina (unicode)
+% fin3 fin2 med2 : syriac
+%
+% cpsp : percentage spacing (todo)
+%
+% dtls flac :math
+
+\definefontfeature
+  [always]
+  [mode=node,    % we had 'auto', but let's try 'node' for a while and see what the impact is
+   script=auto,  % on speed; 'base' just doesn't play well with dynamics; some day we can even
+   autoscript=position,
+   autolanguage=position,
+   kern=yes,     % consider skipping the base passes when no base mode is used
+   mark=yes,
+   mkmk=yes,
+   curs=yes]
+
+\definefontfeature
+  [default]
+  [always]
+  [liga=yes,
+% ccmp=yes, % maybe too
+% locl=yes, % maybe too
+% calt=yes, % maybe too
+% clig=yes, % maybe too
+% rlig=yes, % maybe too
+   tlig=yes,
+   trep=yes] % texligatures=yes,texquotes=yes
+
+\definefontfeature
+  [original] % a clone of default so we can revert
+  [default]
+
+\definefontfeature
+  [smallcaps]
+  [always]
+  [smcp=yes,
+   tlig=yes,
+   trep=yes] % texligatures=yes,texquotes=yes
+
+\definefontfeature
+  [oldstyle]
+  [always]
+  [onum=yes,
+   liga=yes,
+   tlig=yes,
+   trep=yes] % texligatures=yes,texquotes=yes
+
+\definefontfeature
+  [inlinenumbers]
+  [pnum=yes,
+   tnum=no]
+
+\definefontfeature
+  [tabularnumbers]
+  [tnum=yes,
+   pnum=no]
+
+\definefontfeature
+  [oldstylenumbers]
+  [onum=yes]
+
+\definefontfeature
+  [zero]
+  [zero=yes]
+
+% \definefontfeature
+%   [newstyle]
+%   [onum=no]
+
+\definefontfeature % == default unless redefined
+  [ligatures]
+  [always]
+  [liga=yes,
+   tlig=yes,
+   trep=yes]
+
+\definefontfeature
+  [letterspacing]
+  [liga=no,
+   rlig=no,
+   clig=no,
+   dlig=no,
+   ccmp=yes,
+   keepligatures=auto]
+
+\definefontfeature % can be used for type1 fonts
+  [complete]
+  [always]
+  [compose=yes,
+   liga=yes,
+% ccmp=yes,
+% locl=yes,
+% calt=yes,
+% clig=yes,
+% rlig=yes,
+   tlig=yes,
+   trep=yes]
+
+\definefontfeature
+  [none]
+  [mode=none,
+   features=no]
+
+\definefontfeature
+  [semitic-complete]
+  [mode=node,analyze=yes,language=dflt,ccmp=yes,
+   autoscript=position,autolanguage=position,
+   init=yes,medi=yes,fina=yes,isol=yes,
+ % fin2=yes,fin3=yes,med2=yes,
+   mark=yes,mkmk=yes,kern=yes,curs=yes,
+   liga=yes,dlig=yes,rlig=yes,clig=yes,calt=yes]
+
+\definefontfeature
+  [semitic-simple]
+  [mode=node,analyze=yes,language=dflt,ccmp=yes,
+   autoscript=position,autolanguage=position,
+   init=yes,medi=yes,fina=yes,isol=yes,
+ % fin2=yes,fin3=yes,med2=yes,
+   mark=yes,mkmk=yes,kern=yes,curs=yes,
+   rlig=yes,calt=yes]
+
+\definefontfeature
+  [arabic]
+  [semitic-complete]
+  [script=arab]
+
+\definefontfeature
+  [syriac]
+  [arabic]
+  [fin2=yes,fin3=yes,med2=yes]
+
+\definefontfeature
+  [reordercombining]
+  [reordercombining=yes]
+
+\definefontfeature
+  [hebrew]
+  [semitic-complete]
+  [script=hebr,
+   reordercombining=yes] % seems to work best with reasonable fonts
+
+\definefontfeature
+  [simplearabic]
+  [semitic-simple]
+  [script=arab]
+
+\definefontfeature
+  [simplehebrew]
+  [semitic-simple]
+  [script=hebr]
+
+% indic
+
+\definefontfeature
+  [indic-common]
+  [mode=node,
+   language=dflt,
+   % localized
+   locl=yes,
+   % positioning
+   kern=yes,
+   dist=yes,
+   % above/below base marks
+   abvm=yes,
+   blwm=yes,
+   % basic shaping
+   nukt=yes,
+   akhn=yes,
+   rphf=yes,
+   % presentation
+   pres=yes,
+   abvs=yes,
+   blws=yes,
+   psts=yes,
+   haln=yes,
+   calt=yes]
+
+\definefontfeature
+  [devanagari-one]
+  [indic-common]
+  [script=deva,
+   % basic shaping
+   rkrf=yes,
+   blwf=yes,
+   half=yes,
+   vatu=yes,
+   cjct=yes]
+
+\definefontfeature
+  [bengali-one]
+  [indic-common]
+  [script=beng,
+   % basic shaping
+   blwf=yes,
+   half=yes,
+   pstf=yes,
+   vatu=yes,
+   cjct=yes,
+   % presentation
+   init=yes]
+
+\definefontfeature
+  [gujarati-one]
+  [indic-common]
+  [script=gujr,
+   % basic shaping
+   rkrf=yes,
+   blwf=yes,
+   half=yes,
+   vatu=yes,
+   cjct=yes]
+
+\definefontfeature
+  [gurmukhi-one]
+  [indic-common]
+  [script=guru,
+   % basic shaping
+   blwf=yes,
+   half=yes,
+   pstf=yes,
+   vatu=yes,
+   cjct=yes]
+
+\definefontfeature
+  [kannada-one]
+  [indic-common]
+  [script=knda,
+   % basic shaping
+   pref=yes,
+   blwf=yes,
+   half=yes,
+   pstf=yes,
+   cjct=yes]
+
+\definefontfeature
+  [malayalam-one]
+  [indic-common]
+  [script=mlym,
+   % basic shaping
+   pref=yes,
+   blwf=yes,
+   half=yes,
+   pstf=yes,
+   cjct=yes]
+
+\definefontfeature
+  [oriya-one]
+  [indic-common]
+  [script=orya,
+   % basic shaping
+   blwf=yes,
+   pstf=yes,
+   cjct=yes]
+
+\definefontfeature
+  [tamil-one]
+  [indic-common]
+  [script=taml,
+   % basic shaping
+   pref=yes,
+   half=yes]
+
+\definefontfeature
+  [telugu-one]
+  [indic-common]
+  [script=telu,
+   % basic shaping
+   pref=yes,
+   blwf=yes,
+   half=yes,
+   pstf=yes,
+   cjct=yes]
+
+\definefontfeature [devanagari-two] [devanagari-one] [script=dev2]
+\definefontfeature [bengali-two]    [bengali-one]    [script=bng2]
+\definefontfeature [gujarati-two]   [gujarati-one]   [script=gjr2]
+\definefontfeature [gurmukhi-two]   [gurmukhi-one]   [script=gur2]
+\definefontfeature [kannada-two]    [kannada-one]    [script=knd2]
+\definefontfeature [malayalam-two]  [malayalam-one]  [script=mlm2]
+\definefontfeature [oriya-two]      [oriya-one]      [script=ory2]
+\definefontfeature [tamil-two]      [tamil-one]      [script=tml2]
+\definefontfeature [telugu-two]     [telugu-one]     [script=tel2]
+
+% mongolian
+
+\definefontfeature
+  [mongolian]
+  [default]
+  [script=mong,
+   init=yes,medi=yes,fina=yes,isol=yes,
+   rlig=yes,rclt=yes,calt=yes,
+  %dlig=yes,cswh=yes, % optional
+   mset]
+
+% tibetan
+
+\definefontfeature
+  [tibetan]
+  [always]
+  [script=tibt,
+   language=dflt,
+   locl=yes,
+   ccmp=yes,
+   abvs=yes,
+   blws=yes,
+   calt=yes,
+   liga=yes,
+   abvm=yes,
+   blwm=yes]
+
+% cjk
+
+\definefontfeature
+  [jamoforms]
+  [ljmo=yes,
+   tjmo=yes,
+   vjmo=yes]
+
+% \definefontfeature
+%   [japanese]
+%   [default]
+%   [language=jan]
+
+% \definefontfeature
+%   [simplified-chinese]
+%   [default]
+%   [language=zhs]
+
+% \definefontfeature
+%   [traditional-chinese]
+%   [default]
+%   [language=zht]
+
+% \definefontfeature
+%   [chinese]
+%   [simplified-chinese]
+
+% \definefontfeature
+%   [korean]
+%   [default]
+%   [language=kor]
+
+% symbols:
+
+\definefontfeature
+  [dingbats]
+  [mode=base,
+   goodies=dingbats,
+   unicoding=yes]
+
+% math:
+
+\definefontfeature
+  [mathematics]
+  [mode=base,
+   kern=yes,
+ % liga=yes, % makes no sense
+ % tlig=yes, % makes no sense
+ % trep=yes, % makes no sense
+   mathnolimitsmode={0,800}, % this looks okay on the average font
+   mathalternates=yes,
+   mathitalics=yes, % we pass them
+   mathdimensions=all,
+ % mathgaps=yes,
+   language=dflt,
+   script=math]
+
+\ifdefined\mathnolimitsmode
+    \mathnolimitsmode\plusone % font driven (only opentype)
+\fi
+
+\ifdefined\mathitalicsmode
+    \mathitalicsmode\plusone   % simple noads become zero
+  % \mathitalicsmode\plustwo   % idem but inner is kept (for testing)
+\fi
+
+% \adaptfontfeature[*math*][mathnolimitsmode=1000] % only subscript
+
+\definefontfeature
+  [mathematics-l2r]
+  [mathematics]
+  []
+
+% \definefontfeature
+%   [mathematics-r2l]
+%   [mathematics]
+%   [language=ara,
+%    rtlm=yes,
+%    locl=yes]
+
+\definefontfeature
+  [mathematics-r2l]
+  [mathematics]
+  [rtlm=yes,
+   locl=yes]
+
+\definefontfeature[virtualmath]              [mathematics]      % downward compatibility
+\definefontfeature[virtualmath-l2r]          [mathematics-l2r]  % downward compatibility
+\definefontfeature[virtualmath-r2l]          [mathematics-r2l]  % downward compatibility
+
+\definefontfeature[math-text]                [mathematics]      [ssty=no]
+\definefontfeature[math-script]              [mathematics]      [ssty=1,mathsize=yes]
+\definefontfeature[math-scriptscript]        [mathematics]      [ssty=2,mathsize=yes]
+
+\definefontfeature[math-text-l2r]            [mathematics-l2r]  [ssty=no]
+\definefontfeature[math-script-l2r]          [mathematics-l2r]  [ssty=1,mathsize=yes]
+\definefontfeature[math-scriptscript-l2r]    [mathematics-l2r]  [ssty=2,mathsize=yes]
+
+\definefontfeature[math-text-r2l]            [mathematics-r2l]  [ssty=no]
+\definefontfeature[math-script-r2l]          [mathematics-r2l]  [ssty=1,mathsize=yes]
+\definefontfeature[math-scriptscript-r2l]    [mathematics-r2l]  [ssty=2,mathsize=yes]
+
+\definefontfeature[math-nostack-text]        [math-text]        [nostackmath=yes]
+\definefontfeature[math-nostack-script]      [math-script]      [nostackmath=yes]
+\definefontfeature[math-nostack-scriptscript][math-scriptscript][nostackmath=yes]
+
+% \definefontfeature[mathtext]         [math-text]
+% \definefontfeature[mathscript]       [math-script]
+% \definefontfeature[mathscriptscript] [math-scriptscript]
+
+\definefontfeature
+  [missing]
+  [missing=yes]
+
+%D Nice to have too:
+
+\definefontfeature
+  [quality]
+  [expansion=quality,
+   protrusion=quality]
+
+\definefontfeature
+  [fullprotrusion]
+  [protrusion=pure]
+
+\definefontfeature
+  [slanted]
+  [slant=.2]
+
+% \definefontfeature
+%   [boldened]
+%   [extend=1.2]
+
+%D Neat:
+
+% By eye:
+%
+% \definefontfeature[boldened-10][effect={width=0.10,delta=1.0,hdelta=0.500,ddelta=0.150,vshift=0.125,extend=1.025,squeeze=0.99250}]
+% \definefontfeature[boldened-15][effect={width=0.15,delta=1.0,hdelta=0.500,ddelta=0.150,vshift=0.250,extend=1.050,squeeze=0.98750}]
+% \definefontfeature[boldened-20][effect={width=0.20,delta=1.0,hdelta=0.500,ddelta=0.150,vshift=0.375,extend=1.075,squeeze=0.98125}]
+% \definefontfeature[boldened-30][effect={width=0.30,delta=1.0,hdelta=0.500,ddelta=0.150,vshift=0.500,extend=1.100,squeeze=0.97500}]
+%
+% By calculation:
+%
+% \definefontfeature[boldened-10][effect={width=0.10,delta=1.0,hdelta=0.02500,ddelta=0.02500,vshift=0.02500,extend=1.050,squeeze=0.99500}]
+% \definefontfeature[boldened-15][effect={width=0.15,delta=1.0,hdelta=0.05625,ddelta=0.05625,vshift=0.05625,extend=1.075,squeeze=0.99250}]
+% \definefontfeature[boldened-20][effect={width=0.20,delta=1.0,hdelta=0.10000,ddelta=0.10000,vshift=0.10000,extend=1.100,squeeze=0.99000}]
+% \definefontfeature[boldened-30][effect={width=0.30,delta=1.0,hdelta=0.22500,ddelta=0.22500,vshift=0.22500,extend=1.150,squeeze=0.98500}]
+%
+% So we can do this:
+
+\definefontfeature[boldened-10][effect={width=0.10,auto=yes}]
+\definefontfeature[boldened-15][effect={width=0.15,auto=yes}]
+\definefontfeature[boldened-20][effect={width=0.20,auto=yes}]
+\definefontfeature[boldened-25][effect={width=0.25,auto=yes}]
+\definefontfeature[boldened-30][effect={width=0.30,auto=yes}]
+
+\definefontfeature
+  [boldened]
+  [boldened-30]
+
+%D Emoji etc:
+
+\definefontfeature[bandw:overlay][ccmp=yes,dist=yes]
+\definefontfeature[color:overlay][ccmp=yes,dist=yes,colr=yes]
+%definefontfeature[bandw:svg]    [ccmp=yes,dist=yes]
+\definefontfeature[color:svg]    [ccmp=yes,dist=yes,svg=yes]
+%definefontfeature[bandw:bitmap] [ccmp=yes,dist=yes,sbix=yes]
+\definefontfeature[color:bitmap] [ccmp=yes,dist=yes,sbix=yes] % also cblc
+
+% Plus an automatic one:
+
+\definefontfeature[color]        [ccmp=yes,dist=yes,color=auto]
+
+%D We define some colors that are used in tracing (for instance \OPENTYPE\
+%D features). We cannot yet inherit because no colors are predefined.
+
+\definecolor[font:init][r=.75]
+\definecolor[font:medi][g=.75]
+\definecolor[font:fina][b=.75]
+\definecolor[font:isol][r=.75,g=.75] % [y=.75]
+\definecolor[font:mark][r=.75,b=.75] % [m=.75]
+\definecolor[font:rest][b=.75,g=.75] % [c=.75]
+
+\definecolor[font:0] [s=1]
+\definecolor[font:1] [r=.75]
+\definecolor[font:2] [g=.75]
+\definecolor[font:3] [b=.75]
+\definecolor[font:4] [r=.75,g=.75]
+\definecolor[font:5] [r=.75,b=.75]
+\definecolor[font:6] [b=.75,g=.75]
+\definecolor[font:7] [r=.75]
+\definecolor[font:8] [g=.75]
+\definecolor[font:9] [b=.75]
+
+\definecolor[f:r:t][a=1,t=.25,r=1]
+\definecolor[f:g:t][a=1,t=.25,g=1]
+\definecolor[f:b:t][a=1,t=.25,b=1]
+\definecolor[f:c:t][a=1,t=.25,c=1]
+\definecolor[f:m:t][a=1,t=.25,m=1]
+\definecolor[f:y:t][a=1,t=.25,y=1]
+\definecolor[f:k:t][a=1,t=.25,s=0]
+\definecolor[f:s:t][a=1,t=.25,s=0]
+
+\definepalet % weird place
+  [layout]
+  [grid=trace:dr,
+   page=trace:dg,
+   profile=f:s:t,
+   one=f:y:t,
+   mix=f:b:t]
+
+%D Now we're up to some definitions.
+
+\definebodyfontenvironment
+  [\s!default]
+  [        \s!text=1.0,
+         \s!script=0.7,
+   \s!scriptscript=0.5,
+              \s!a=1.200,
+              \s!b=1.440,
+              \s!c=1.728,
+              \s!d=2.074,
+                 *=\font_currentfontscale, % wildcard
+              \s!x=0.8,
+             \s!xx=0.6,
+            \v!big=1.2,
+          \v!small=0.8,
+ \c!interlinespace=,
+             \s!em=\v!slanted]
+
+\definebodyfontenvironment
+  [20.7pt]
+  [        \s!text=20.7pt,
+         \s!script=\!!fourteenpointfour,
+   \s!scriptscript=\!!twelvepoint,
+              \s!x=17.3pt,
+             \s!xx=\!!fourteenpointfour,
+            \v!big=20.7pt,    % !!!!
+          \v!small=17.3pt]
+
+\definebodyfontenvironment
+  [17.3pt]
+  [        \s!text=17.3pt,
+         \s!script=\!!twelvepoint,
+   \s!scriptscript=\!!tenpoint,
+              \s!x=\!!fourteenpointfour,
+             \s!xx=\!!twelvepoint,
+            \v!big=20.7pt,
+          \v!small=\!!fourteenpointfour]
+
+\definebodyfontenvironment
+  [\!!fourteenpointfour]
+  [        \s!text=\!!fourteenpointfour,
+         \s!script=\!!elevenpoint,
+   \s!scriptscript=\!!ninepoint,
+              \s!x=\!!twelvepoint,
+             \s!xx=\!!tenpoint,
+            \v!big=17.3pt,
+          \v!small=\!!twelvepoint]
+
+\definebodyfontenvironment
+  [\!!twelvepoint]
+  [        \s!text=\!!twelvepoint,
+         \s!script=\!!ninepoint,
+   \s!scriptscript=\!!sevenpoint,
+              \s!x=\!!tenpoint,
+             \s!xx=\!!eightpoint,
+            \v!big=\!!fourteenpointfour,
+          \v!small=\!!tenpoint]
+
+\definebodyfontenvironment
+  [\!!elevenpoint]
+  [        \s!text=\!!elevenpoint,
+         \s!script=\!!eightpoint,
+   \s!scriptscript=\!!sixpoint,
+              \s!x=\!!ninepoint,
+             \s!xx=\!!sevenpoint,
+            \v!big=\!!twelvepoint,
+          \v!small=\!!ninepoint]
+
+\definebodyfontenvironment
+  [\!!tenpoint]
+  [        \s!text=\!!tenpoint,
+         \s!script=\!!sevenpoint,
+   \s!scriptscript=\!!fivepoint,
+              \s!x=\!!eightpoint,
+             \s!xx=\!!sixpoint,
+            \v!big=\!!twelvepoint,
+          \v!small=\!!eightpoint]
+
+\definebodyfontenvironment
+  [\!!ninepoint]
+  [        \s!text=\!!ninepoint,
+         \s!script=\!!sevenpoint,
+   \s!scriptscript=\!!fivepoint,
+              \s!x=\!!sevenpoint,
+             \s!xx=\!!fivepoint,
+            \v!big=\!!elevenpoint,
+          \v!small=\!!sevenpoint]
+
+\definebodyfontenvironment
+  [\!!eightpoint]
+  [        \s!text=\!!eightpoint,
+         \s!script=\!!sixpoint,
+   \s!scriptscript=\!!fivepoint,
+              \s!x=\!!sixpoint,
+             \s!xx=\!!fivepoint,
+            \v!big=\!!tenpoint,
+          \v!small=\!!sixpoint]
+
+\definebodyfontenvironment
+  [\!!sevenpoint]
+  [        \s!text=\!!sevenpoint,
+         \s!script=\!!sixpoint,
+   \s!scriptscript=\!!fivepoint,
+              \s!x=\!!sixpoint,
+             \s!xx=\!!fivepoint,
+            \v!big=\!!ninepoint,
+          \v!small=\!!fivepoint]
+
+\definebodyfontenvironment
+  [\!!sixpoint]
+  [        \s!text=\!!sixpoint,
+         \s!script=\!!fivepoint,
+   \s!scriptscript=\!!fivepoint,
+              \s!x=\!!fivepoint,
+             \s!xx=\!!fivepoint,
+            \v!big=\!!eightpoint,
+          \v!small=\!!fivepoint]
+
+\definebodyfontenvironment
+  [\!!fivepoint]
+  [        \s!text=\!!fivepoint,
+         \s!script=\!!fivepoint,
+   \s!scriptscript=\!!fivepoint,
+              \s!x=\!!fivepoint,
+             \s!xx=\!!fivepoint,
+            \v!big=\!!sevenpoint,
+          \v!small=\!!fivepoint]
+
+\definebodyfontenvironment
+  [\!!fourpoint]
+  [        \s!text=\!!fourpoint,
+         \s!script=\!!fourpoint,
+   \s!scriptscript=\!!fourpoint,
+              \s!x=\!!fourpoint,
+             \s!xx=\!!fourpoint,
+            \v!big=\!!sixpoint,
+          \v!small=\!!fourpoint]
+
+\definebodyfontswitch [fourteenpointfour] [\!!fourteenpointfour]
+\definebodyfontswitch [twelvepoint]       [\!!twelvepoint]
+\definebodyfontswitch [elevenpoint]       [\!!elevenpoint]
+\definebodyfontswitch [tenpoint]          [\!!tenpoint]
+\definebodyfontswitch [ninepoint]         [\!!ninepoint]
+\definebodyfontswitch [eightpoint]        [\!!eightpoint]
+\definebodyfontswitch [sevenpoint]        [\!!sevenpoint]
+\definebodyfontswitch [sixpoint]          [\!!sixpoint]
+\definebodyfontswitch [fivepoint]         [\!!fivepoint]
+\definebodyfontswitch [fourpoint]         [\!!fourpoint]
+
+%D So far.
+
+\definefontstyle [\s!hw] [\s!hw]
+\definefontstyle [\s!cg] [\s!cg]
+
+\definefontstyle [\v!roman,\v!serif,\v!regular]    [\s!rm]
+\definefontstyle [\v!sansserif,\v!sans,\v!support] [\s!ss]
+\definefontstyle [\v!teletype,\v!type,\v!mono]     [\s!tt]
+\definefontstyle [\v!handwritten]                  [\s!hw]
+\definefontstyle [\v!calligraphic]                 [\s!cg]
+\definefontstyle [\v!math,\v!mathematics]          [\s!mm]
+
+\definefontalternative[\s!tf]
+\definefontalternative[\s!bf]
+\definefontalternative[\s!it]
+\definefontalternative[\s!sl]
+\definefontalternative[\s!bs]
+\definefontalternative[\s!bi]
+\definefontalternative[\s!sc]
+
+\definefontsize[\s!a] \definefontsize[\s!b]
+\definefontsize[\s!c] \definefontsize[\s!d]
+
+\definealternativestyle [\v!mediaeval]                              [\os]    []
+\definealternativestyle [\v!normal]                                 [\tf]    []
+\definealternativestyle [\v!bold]                                   [\bf]    []
+\definealternativestyle [\v!type]                                   [\tt]    []
+\definealternativestyle [\v!mono]                                   [\tt]    []
+\definealternativestyle [\v!slanted]                                [\sl]    []
+\definealternativestyle [\v!italic]                                 [\it]    []
+\definealternativestyle [\v!boldslanted,\v!slantedbold]             [\bs]    []
+\definealternativestyle [\v!bolditalic,\v!italicbold]               [\bi]    []
+
+\definealternativestyle [\v!small,\v!smallnormal]                   [\setsmallbodyfont\tf] []
+\definealternativestyle [\v!smallbold]                              [\setsmallbodyfont\bf] []
+\definealternativestyle [\v!smalltype]                              [\setsmallbodyfont\tt] []
+\definealternativestyle [\v!smallitalic,\v!smallslanted]            [\setsmallbodyfont\sl] []
+\definealternativestyle [\v!smallboldslanted,\v!smallslantedbold]   [\setsmallbodyfont\bs] []
+\definealternativestyle [\v!smallbolditalic,\v!smallitalicbold]     [\setsmallbodyfont\bi] []
+
+\definealternativestyle [\v!bigger]                                 [\setbigbodyfont  \tf] []
+\definealternativestyle [\v!smaller]                                [\setsmallbodyfont\tf] []
+
+\definealternativestyle [\v!sans,\v!sansserif]                      [\ss]
+\definealternativestyle [\v!roman,\v!serif,\v!regular]              [\rm]
+\definealternativestyle [\v!handwritten]                            [\hw]
+\definealternativestyle [\v!calligraphic]                           [\cg]
+
+\definealternativestyle [\v!sansnormal]  [\ss\tf] []
+\definealternativestyle [\v!sansbold]    [\ss\bf] []
+\definealternativestyle [\v!serifnormal] [\rm\tf] []
+\definealternativestyle [\v!serifbold]   [\rm\bf] []
+\definealternativestyle [\v!mononormal]  [\tt\tf] []
+\definealternativestyle [\v!monobold]    [\tt\bf] []
+
+\definealternativestyle [typeface]    [\typeface]    [] % no translation here (quite basic)
+\definealternativestyle [boldface]    [\boldface]    []
+\definealternativestyle [slantedface] [\slantedface] []
+\definealternativestyle [italicface]  [\italicface]  []
+\definealternativestyle [swapface]    [\swapface]    []
+
+\definealternativestyle [emphasize]   [\em]          [\em] % new
+
+% For Alan:
+
+\definealternativestyle
+  [\v!camel]
+  [{\setcharactercasing[\v!camel]}]
+  [{\setcharactercasing[\v!camel]}]
+
+% % maybe we need interface neutral as well (for use in cld):
+%
+% \letcscsname\mediaeval       \csname\v!mediaeval       \endcsname
+% \letcscsname\normal          \csname\v!normal          \endcsname
+% \letcscsname\bold            \csname\v!bold            \endcsname
+% \letcscsname\mono            \csname\v!mono            \endcsname
+% \letcscsname\slanted         \csname\v!slanted         \endcsname
+% \letcscsname\italic          \csname\v!italic          \endcsname
+% \letcscsname\boldslanted     \csname\v!boldslanted     \endcsname
+% \letcscsname\slantedbold     \csname\v!slantedbold     \endcsname
+% \letcscsname\bolditalic      \csname\v!bolditalic      \endcsname
+% \letcscsname\italicbold      \csname\v!italicbold      \endcsname
+%
+% \letcscsname\small           \csname\v!small           \endcsname
+% \letcscsname\smallnormal     \csname\v!smallnormal     \endcsname
+% \letcscsname\smallbold       \csname\v!smallbold       \endcsname
+% \letcscsname\smalltype       \csname\v!smalltype       \endcsname
+% \letcscsname\smallslanted    \csname\v!smallslanted    \endcsname
+% \letcscsname\smallboldslanted\csname\v!smallboldslanted\endcsname
+% \letcscsname\smallslantedbold\csname\v!smallslantedbold\endcsname
+% \letcscsname\smallbolditalic \csname\v!smallbolditalic \endcsname
+% \letcscsname\smallitalicbold \csname\v!smallitalicbold \endcsname
+%
+% \letcscsname\bigger          \csname\v!bigger          \endcsname
+% \letcscsname\smaller         \csname\v!smaller         \endcsname
+%
+% \letcscsname\sans            \csname\v!sans            \endcsname
+% \letcscsname\sansserif       \csname\v!sansserif       \endcsname
+% \letcscsname\sansbold        \csname\v!sansbold        \endcsname
+
+%D We can go on and on and on:
+%D
+%D \starttyping
+%D \setupbodyfontenvironment[default][p=0.8,q=0.6]
+%D \definefontsize[p]
+%D \definefontsize[q]
+%D \stoptyping
+
+%D Slow but handy:
+
+\definealternativestyle [\v!smallbodyfont] [\setsmallbodyfont] []
+\definealternativestyle [\v!bigbodyfont]   [\setbigbodyfont]   []
+
+%D We treat {\sc Small Caps} and \cap {Pseudo Caps} a bit different. We also provide
+%D an \WORD {uppercase} style.
+
+\definealternativestyle [\v!WORD]    [{\setcharactercasing[\v!WORD   ]}] [{\setcharactercasing[\v!WORD   ]}]
+\definealternativestyle [\v!word]    [{\setcharactercasing[\v!word   ]}] [{\setcharactercasing[\v!word   ]}]
+\definealternativestyle [\v!Word]    [{\setcharactercasing[\v!Word   ]}] [{\setcharactercasing[\v!Word   ]}]
+\definealternativestyle [\v!Words]   [{\setcharactercasing[\v!Words  ]}] [{\setcharactercasing[\v!Words  ]}]
+\definealternativestyle [\v!capital] [{\setcharactercasing[\v!capital]}] [{\setcharactercasing[\v!capital]}]
+\definealternativestyle [\v!Capital] [{\setcharactercasing[\v!Capital]}] [{\setcharactercasing[\v!Capital]}]
+\definealternativestyle [\v!mixed]   [{\setcharactercasing[\v!mixed  ]}] [{\setcharactercasing[\v!mixed  ]}]
+
+\definealternativestyle [\v!cap]     [{\setcharactercasing[\v!cap    ]}] [{\setcharactercasing[\v!cap    ]}]
+\definealternativestyle [\v!Cap]     [{\setcharactercasing[\v!Cap    ]}] [{\setcharactercasing[\v!Cap    ]}]
+
+%D From now (2013-03-17) on we have:
+
+\definefontfeature[f:smallcaps][smcp=yes]
+\definefontfeature[f:oldstyle] [onum=yes]
+\definefontfeature[f:tabular]  [tnum=yes]
+\definefontfeature[f:superiors][sups=yes]
+\definefontfeature[f:inferiors][subs=yes]
+\definefontfeature[f:fractions][frac=yes]
+\definefontfeature[f:kern]     [kern=yes]
+\definefontfeature[f:kerns]    [kern=yes]
+
+\definealternativestyle [\v!smallcaps] [\setsmallcaps] [\setsmallcaps]
+\definealternativestyle [\v!oldstyle]  [\setoldstyle ] [\setoldstyle ]
+\definealternativestyle [\v!fractions] [\setfractions\resetbreakpoints] [\setfractions\resetbreakpoints]
+
+\permanent\protected\def\setsmallcaps{\doaddfeature{f:smallcaps}}
+\permanent\protected\def\setoldstyle {\doaddfeature{f:oldstyle}}
+\permanent\protected\def\settabular  {\doaddfeature{f:tabular}}
+\permanent\protected\def\setsuperiors{\doaddfeature{f:superiors}}
+\permanent\protected\def\setfractions{\doaddfeature{f:fractions}}
+
+% \permanent\protected\def\frc#1#2%
+%   {\dontleavehmode
+%    \begingroup
+%    \addff{frac}%
+%    \resetbreakpoints
+%    #1/#2%
+%    \endgroup}
+
+%D \macros
+%D   {uppercasing, lowercasing}
+
+\definefontfeature[lowercasing][lowercasing=yes]
+\definefontfeature[uppercasing][uppercasing=yes]
+
+\permanent\protected\def\uppercasing{\addff{uppercasing}}
+\permanent\protected\def\lowercasing{\addff{lowercasing}}
+
+%D \macros
+%D   {tinyfont}
+%D
+%D By default we load the Computer Modern Roman fonts (but not yet at this moment)
+%D and activate the 12pt roman bodyfont. Sans serif and teletype are also available
+%D and can be called for by \type {\ss} and \type {\tt}. Loading takes place
+%D elsewhere. For tracing purposes we define:
+
+\definefont[tinyfont][file:dejavusansmono at 1ex]
+
+%D \macros
+%D   {infofont}
+%D
+%D The second situation occurs when we enable the info mode, and put all kind of
+%D status information in the margin. We don't want huge switches to the main
+%D bodyfont and style, so here too we use a direct method.
+
+\pushoverloadmode
+
+\let\infofont         \relax
+\let\infofontbold     \relax
+\let\smallinfofont    \relax
+\let\smallinfofontbold\relax
+
+\definefont[infofont]         [file:dejavusansmono*none      at 6pt]
+\definefont[infofontbold]     [file:dejavusansmono-bold*none at 6pt]
+\definefont[smallinfofont]    [file:dejavusansmono*none      at 3pt]
+\definefont[smallinfofontbold][file:dejavusansmono-bold*none at 3pt]
+
+%D Optimization (later we overload in math). Also needed in order to get \type {\ss}
+%D properly defined.
+
+\permanent\protected\def\normaltf{\let\fontalternative\s!tf\font_helpers_synchronize_font}
+\permanent\protected\def\normalbf{\let\fontalternative\s!bf\font_helpers_synchronize_font}
+\permanent\protected\def\normalit{\let\fontalternative\s!it\font_helpers_synchronize_font}
+\permanent\protected\def\normalsl{\let\fontalternative\s!sl\font_helpers_synchronize_font}
+\permanent\protected\def\normalbi{\let\fontalternative\s!bi\font_helpers_synchronize_font}
+\permanent\protected\def\normalbs{\let\fontalternative\s!bs\font_helpers_synchronize_font}
+
+\let\tf\normaltf
+\let\bf\normalbf
+\let\it\normalit
+\let\sl\normalsl
+\let\bi\normalbi
+\let\bs\normalbs
+
+\permanent\protected\def\normalrm{\font_helpers_set_current_font_style{\s!rm}}
+\permanent\protected\def\normalss{\font_helpers_set_current_font_style{\s!ss}}
+\permanent\protected\def\normaltt{\font_helpers_set_current_font_style{\s!tt}}
+
+\let\rm\normalrm
+\let\ss\normalss
+\let\tt\normaltt
+
+\popoverloadmode
+
+\protect \endinput
+
+% LM math vs CM math (analysis by Taco):
+%
+% Computer Modern Roman : Donald Knuth
+% Latin Modern          : LM Font Revision Team
+%
+% lmex10.tfm  % identical
+% lmmi5.tfm   % identical
+% lmmi6.tfm   % identical
+% lmmi7.tfm   % identical
+% lmmi8.tfm   % identical
+% lmmi9.tfm   % identical
+% lmmi10.tfm  % identical
+% lmmi12.tfm  % identical
+% lmmib10.tfm % identical
+% lmsy5.tfm   % extra chars: 254,255 (octal)
+% lmsy6.tfm   % extra chars: 254,255 (octal)
+% lmsy7.tfm   % extra chars: 254,255 (octal)
+% lmsy8.tfm   % extra chars: 254,255 (octal)
+% lmsy9.tfm   % extra chars: 254,255 (octal)
+% lmsy10.tfm  % extra chars: 254,255 (octal)
+% lmbsy10.tfm % extra chars: 254,255 (octal)
+%
+% From the 'AMS' set:
+%
+% lmmib5.tfm  % identical
+% lmmib7.tfm  % identical
+% lmbsy5.tfm  % extra chars: 254,255 (octal)
+% lmbsy7.tfm  % extra chars: 254,255 (octal)
+%
+% The two extra characters are:
+%
+%   /lessorequalslant
+%   /greaterorequalslant
+
+% \unprotect
+%
+% \definehighlight[\v!italic    ][\c!command=\v!no,\c!style=\v!italic]
+% \definehighlight[\v!bold      ][\c!command=\v!no,\c!style=\v!bold]
+% \definehighlight[\v!bolditalic][\c!command=\v!no,\c!style=\v!bolditalic]
+% \definehighlight[\v!mono]      [\c!command=\v!no,\c!style=\v!mono]
+% \definehighlight[\v!monobold]  [\c!command=\v!no,\c!style=\v!monobold]
+%
+% \definehighlight[important]    [\c!command=\v!no,\c!style=\v!bold]
+% \definehighlight[unimportant]  [\c!command=\v!no,\c!color=darkgray]
+% \definehighlight[warning]      [\c!command=\v!no,\c!style=\v!bold,\c!color=darkblue]
+% \definehighlight[error]        [\c!command=\v!no,\c!style=\v!bold,\c!color=darkred]
+%
+% \protect
+%
+% \starttext
+%     \highlight[italic]     {italic}
+%     \highlight[bolditalic] {bolditalic}
+%     \highlight[bold]       {bold}
+%     \highlight[mono]       {mono}
+%     \highlight[monobold]   {monobold}
+%     \highlight[important]  {important}
+%     \highlight[unimportant]{unimportant}
+%     \highlight[warning]    {warning}
+%     \highlight[error]      {error}
+% \stoptext
diff --git a/tex/context/base/mkiv/font-sym.mklx b/tex/context/base/mkiv/font-sym.mklx
index 80b47edab..d95314099 100644
--- a/tex/context/base/mkiv/font-sym.mklx
+++ b/tex/context/base/mkiv/font-sym.mklx
@@ -180,10 +180,10 @@
 \permanent\protected\def\getscaledglyph#scale#name#content%
   {{\setscaledstyledsymbolicfont\fontbody{#scale}{#name}\doifelsenumber{#content}\char\donothing#content}}
 
-\let\getglyph         \getglyphstyled               % old
-\let\getrawglyph      \getglyphdirect               % old
-\let\symbolicsizedfont\setscaledstyledsymbolicfont  % old
-\let\symbolicfont     \setstyledsymbolicfont        % old
+\aliased\let\getglyph         \getglyphstyled              % old, soon obsolete
+\aliased\let\getrawglyph      \getglyphdirect              % old, soon obsolete
+\aliased\let\symbolicsizedfont\setscaledstyledsymbolicfont % old, soon obsolete
+\aliased\let\symbolicfont     \setstyledsymbolicfont       % old, soon obsolete
 
 \permanent\protected\def\symbolicscaledfont{\setscaledstyledsymbolicfont\fontbody}
 
diff --git a/tex/context/base/mkiv/java-ini.mkxl b/tex/context/base/mkiv/java-ini.mkxl
new file mode 100644
index 000000000..513dc20e3
--- /dev/null
+++ b/tex/context/base/mkiv/java-ini.mkxl
@@ -0,0 +1,157 @@
+%D \module
+%D   [       file=java-ini,
+%D        version=1998.01.30,
+%D          title=\CONTEXT\ JavaScript Macros,
+%D       subtitle=Initialization,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt JavaScript Macros / Initialization}
+
+\registerctxluafile{java-ini}{}
+
+\unprotect
+
+%D \macros
+%D   {JS*}
+%D
+%D Because \JAVASCRIPT's are activated by the user, for instance by activating on a
+%D button, their support is closely related to the referencing mechanism.
+%D Integration takes place by
+%D
+%D \starttyping
+%D \goto{calculate total}[Sum()]
+%D \stoptyping
+%D
+%D The \type {()} classify this as a script. If they are absent, the keyword is
+%D treated as a normal reference. One can pass arguments to such a script by saying:
+%D
+%D \starttyping
+%D \goto{calculate total}[Sum(1.5,2.3)]
+%D \stoptyping
+
+%D \macros
+%D   {startJScode}
+%D
+%D A piece of \JAVASCRIPT\ code is defined by saying:
+%D
+%D \starttyping
+%D \startJScode{name}
+%D   name = 4 ;
+%D \stopJScode
+%D \stoptyping
+%D
+%D This assumes uses no preamble or presumes that the preamble is always loaded, the
+%D next definition also tells \CONTEXT\ to actually include the preamble needed.
+%D
+%D \starttyping
+%D \startJScode{uses} used {later}
+%D   uses = 6 ;
+%D \stopJScode
+%D \stoptyping
+%D
+%D \macros
+%D   {startJSpreamble}
+%D
+%D One can define insert \JAVASCRIPT\ code at the document level by using:
+%D
+%D \starttyping
+%D \startJSpreamble{oeps}
+%D   oeps = 1 ;
+%D \stopJSpreamble
+%D \stoptyping
+%D
+%D which is the same as:
+%D
+%D \starttyping
+%D \startJSpreamble{now} used now
+%D   now = 2 ;
+%D \stopJSpreamble
+%D \stoptyping
+%D
+%D while the next definition is only included when actually used.
+%D
+%D \starttyping
+%D \startJSpreamble{later} used later
+%D   later = 3 ;
+%D \stopJSpreamble
+%D \stoptyping
+%D
+%D This command may be used more that once, but always before the first page is
+%D shipped out.
+%D
+%D \macros
+%D   {setJSpreamble, addtoJSpreamble}
+%D
+%D In addition to the previous preamble definitions, we can set a preamble \quote
+%D {in||line} and add tokens to a preamble.
+%D
+%D \macros
+%D   {useJSpreamblenow}
+%D
+%D This macro can be used to force inclusion of postponed \JAVASCRIPT\ preambles.
+
+\def\m_java_escape_u{\letterbackslash u}
+
+\permanent\protected\def\startJScode
+  {\begingroup
+   \obeylualines
+   \obeyluatokens
+   \let\u\m_java_escape_u
+   \java_start_code}
+
+\def\java_start_code#1\stopJScode
+  {\normalexpanded{\endgroup\clf_storejavascriptcode{#1}}}
+
+\aliased\let\stopJScode\relax
+
+\permanent\protected\def\startJSpreamble
+  {\begingroup
+   \obeylualines
+   \obeyluatokens
+   \let\u\m_java_escape_u
+   \java_start_preamble}
+
+\def\java_start_preamble#1\stopJSpreamble
+  {\normalexpanded{\endgroup\clf_storejavascriptpreamble{#1}}}
+
+\aliased\let\stopJSpreamble\relax
+
+\permanent\protected\def\setJSpreamble  #1#2{\clf_setjavascriptpreamble  {#1}{#2}}
+\permanent\protected\def\addtoJSpreamble#1#2{\clf_addtojavascriptpreamble{#1}{#2}}
+
+%D \macros
+%D   {useJSscripts}
+%D
+%D In due time, users will build their collections of scripts, which can be used
+%D (loaded) when applicable. Although not all public, we will provide some general
+%D purpose scripts, collected in files with names like \type {java-...}. One can
+%D load these scripts with \type {\useJSscripts}, like:
+%D
+%D \starttyping
+%D \useJSscripts[fld]
+%D \stoptyping
+%D
+%D The not so complicated implementation of this macro is:
+
+\permanent\tolerant\protected\def\useJSscripts[#1]#*[#2]%
+  {\clf_usejavascriptscripts {#1}%  two steps as this one calls tex code
+   \clf_usejavascriptpreamble{#2}}% so this one comes later
+
+\permanent\tolerant\protected\def\useJSpreamble[#1]%
+  {\clf_usejavascriptpreamble{#1}}% so this one comes later
+
+%D Here:
+
+\definefilesynonym[java-imp-fld.mkiv] [java-imp-fields.mkiv]
+\definefilesynonym[java-imp-stp.mkiv] [java-imp-steps.mkiv]
+\definefilesynonym[java-imp-fil.mkiv] [java-imp-print.mkiv]
+\definefilesynonym[java-imp-rhh.mkiv] [java-imp-highlight.mkiv]
+\definefilesynonym[java-imp-exa.mkiv] [java-imp-example.mkiv]
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/lang-def.mkiv b/tex/context/base/mkiv/lang-def.mkiv
index f2364a128..5698bb4af 100644
--- a/tex/context/base/mkiv/lang-def.mkiv
+++ b/tex/context/base/mkiv/lang-def.mkiv
@@ -256,17 +256,18 @@
    \c!date={\v!day,{.},\space,\v!month,\space,\v!year}]
 
 \installlanguage
- [\s!sl]
- [\c!spacing=\v!packed,
-  \c!leftsentence=\hbox{\endash\space},
-  \c!rightsentence=\hbox{\space\endash},
-  \c!leftsubsentence=\endash,
-  \c!rightsubsentence=\endash,
-  \c!leftquote=\guilsingleright,
-  \c!rightquote=\guilsingleleft,
-  \c!leftquotation=\rightguillemot,
-  \c!rightquotation=\leftguillemot,
-  \c!date={\v!day,{.},\space,\v!month,\space,\v!year}]
+  [\s!sl]
+  [\c!command=\v!no,
+   \c!spacing=\v!packed,
+   \c!leftsentence=\hbox{\endash\space},
+   \c!rightsentence=\hbox{\space\endash},
+   \c!leftsubsentence=\endash,
+   \c!rightsubsentence=\endash,
+   \c!leftquote=\guilsingleright,
+   \c!rightquote=\guilsingleleft,
+   \c!leftquotation=\rightguillemot,
+   \c!rightquotation=\leftguillemot,
+   \c!date={\v!day,{.},\space,\v!month,\space,\v!year}]
 
 \installlanguage [\s!polish]    [\s!pl]
 \installlanguage [\s!czech]     [\s!cs]
@@ -509,7 +510,8 @@
 
 \installlanguage
   [\s!lt]
-  [\c!spacing=\v!packed,
+  [\c!command=\v!no,
+   \c!spacing=\v!packed,
    \c!leftsentence=\emdash,
    \c!rightsentence=\emdash,
    \c!leftsubsentence=\emdash,
@@ -653,7 +655,8 @@
 
 \installlanguage
   [\s!it]
-  [\c!spacing=\v!packed,
+  [\c!command=\v!no,
+   \c!spacing=\v!packed,
    \c!leftsentence=\emdash,
    \c!rightsentence=\emdash,
    \c!leftsubsentence=\endash,
diff --git a/tex/context/base/mkiv/lang-ini.mkxl b/tex/context/base/mkiv/lang-ini.mkxl
index 0565a7844..8ca8d7e8e 100644
--- a/tex/context/base/mkiv/lang-ini.mkxl
+++ b/tex/context/base/mkiv/lang-ini.mkxl
@@ -197,8 +197,8 @@
      \doifelselanguage{#1}
        {\getparameters[\??language#1][#2]}
        {\setvalue{\??languagelinked#1}{#1}%
-        \lang_basics_install_indeed{#1}{#1}%
-        \getparameters[\??language#1][\c!state=\v!start,#2]}%
+        \getparameters[\??language#1][\c!state=\v!start,#2]%
+        \lang_basics_install_indeed{#1}{#1}}%
      \edef\currentsetuplanguage{#1}%
      \clf_definelanguage{#1}{\specificlanguageparameter{#1}\s!default}%
      \the\everysetuplanguage
@@ -209,7 +209,8 @@
   \fi}
 
 \def\lang_basics_install_indeed#1#2%
-  {\ifcsname#1\endcsname\else\setuvalue{#1}{\lang_basics_set_current[#2]}\fi}
+  {\doifnot{\specificlanguageparameter{#1}\c!command}\v!no
+     {\ifcsname#1\endcsname\else\frozen\instance\setuvalue{#1}{\lang_basics_set_current[#2]}\fi}}
 
 %D When the second argument is a language identifier, a synonym is created. This
 %D feature is present because we used dutch mnemonics in the dutch version, but
diff --git a/tex/context/base/mkiv/lxml-css.lua b/tex/context/base/mkiv/lxml-css.lua
index f783a9224..76cc4891e 100644
--- a/tex/context/base/mkiv/lxml-css.lua
+++ b/tex/context/base/mkiv/lxml-css.lua
@@ -1065,13 +1065,15 @@ end
 -- -- faster interface (1.02):
 
 interfaces.implement {
-    name      = "xmlstylevalue",
+    name      = "xmlcssstylevalue",
+    public    = true,
     actions   = css.stylevalue,
     arguments = "2 strings",
 }
 
 interfaces.implement {
-    name      = "xmlmappedstylevalue",
+    name      = "xmlcssmappedstylevalue",
+    public    = true,
     actions   = css.mappedstylevalue,
     arguments = "3 strings",
 }
diff --git a/tex/context/base/mkiv/lxml-css.mkiv b/tex/context/base/mkiv/lxml-css.mkiv
index 04000a6ca..271afdb7d 100644
--- a/tex/context/base/mkiv/lxml-css.mkiv
+++ b/tex/context/base/mkiv/lxml-css.mkiv
@@ -69,8 +69,8 @@
 % \xmlregistersetup{html:settings}
 % \xmlprocessbuffer{main}{temp}{}
 
-\let\xmlcssstylevalue      \clf_xmlstylevalue
-\let\xmlcssmappedstylevalue\clf_xmlmappedstylevalue
+% \xmlcssstylevalue       % defined at lua end
+% \xmlcssmappedstylevalue % defined at lua end
 
 \protect \endinput
 
diff --git a/tex/context/base/mkiv/lxml-css.mkxl b/tex/context/base/mkiv/lxml-css.mkxl
new file mode 100644
index 000000000..c7c8d8afd
--- /dev/null
+++ b/tex/context/base/mkiv/lxml-css.mkxl
@@ -0,0 +1,76 @@
+%D \module
+%D   [       file=lxml-css,
+%D        version=2010.01.28,
+%D          title=\CONTEXT\ Modules,
+%D       subtitle=Css Helpers,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\registerctxluafile{lxml-css}{}
+
+\unprotect
+
+\permanent\def\ctxmodulecss#1{\ctxlua{moduledata.css.#1}}
+
+% No stable interface yet.
+
+%     \edef\CellPadding{\xmlatt{#1}{cellpadding}}
+%     \ifx\CellPadding\empty
+%       \edef\CellPadding{.25ex}
+%     \else
+%       \edef\CellPadding{\cssgetsinglepadding{\xmlatt{#1}{cellpadding}}}
+%     \fi
+%
+% \starttexdefinition cssgetsinglepadding #1
+%    \ctxlua {
+%      context((moduledata.css.padding(
+%          "#1",
+%          \number\dimexpr0.1ex,
+%          \number\dimexpr0.01\hsize,
+%          \number\dimexpr1ex,
+%          \number\dimexpr1em
+%      ))) % returns 4 values therefore ()
+%    }sp
+% \stoptexdefinition
+
+% \startxmlsetups html:settings
+%      \xmlsetsetup{#1}{p}{html:p}
+% \stopxmlsetups
+%
+% \xmlmapvalue{ctx-before}     {one}      {\page BEFORE\par}
+% \xmlmapvalue{ctx-after}      {two}      {\par AFTER\page}
+% \xmlmapvalue{text-decoration}{underline}{U}
+% \xmlmapvalue{text-decoration}{overline} {O}
+%
+% \startxmlsetups html:p
+%     \testfeatureonce{100000}{
+%         \edef\foo{\xmlcssstylevalue{#1}{ctx-before}\xmlcssstylevalue{#1}{ctx-after}}
+%     }
+%     \page {\tttf style="\xmlatt{#1}{style}"} : \elapsedtime\ s \page
+%     \xmlvalue{ctx-before}{\xmlcssstylevalue{#1}{ctx-before}}{}
+%     \xmlflush{#1}
+%     (\xmlcssstylevalue{#1}{text-decoration})
+%     (\xmlcssmappedstylevalue{#1}{text-decoration}{text-decoration})
+%     \xmlvalue{ctx-after} {\xmlcssstylevalue{#1}{ctx-after}}{}
+% \stopxmlsetups
+%
+% \startbuffer[temp]
+% <body>
+%      <p style='ctx-before: one; text-decoration: underline overline; ctx-after: two;'>foo 1</p>
+%      <p>foo 2</p>
+% </body>
+% \stopbuffer
+%
+% \xmlregistersetup{html:settings}
+% \xmlprocessbuffer{main}{temp}{}
+
+% \xmlcssstylevalue       % defined at lua end
+% \xmlcssmappedstylevalue % defined at lua end
+
+\protect \endinput
+
diff --git a/tex/context/base/mkiv/lxml-ctx.mkiv b/tex/context/base/mkiv/lxml-ctx.mkiv
index e0beb22bf..7d44d61be 100644
--- a/tex/context/base/mkiv/lxml-ctx.mkiv
+++ b/tex/context/base/mkiv/lxml-ctx.mkiv
@@ -11,8 +11,8 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-%D Experimental. This might change! Also, it might become a module
-%D instead if core code.
+%D Experimental. This might change! Also, it might become a module instead if
+%D core code.
 
 \writestatus{loading}{ConTeXt XML Support / Goodies}
 
diff --git a/tex/context/base/mkiv/lxml-ctx.mkxl b/tex/context/base/mkiv/lxml-ctx.mkxl
new file mode 100644
index 000000000..f4b2edc79
--- /dev/null
+++ b/tex/context/base/mkiv/lxml-ctx.mkxl
@@ -0,0 +1,58 @@
+%D \module
+%D   [       file=lxml-ctx,
+%D        version=2007.08.17,
+%D          title=\CONTEXT\ \XML\ Support,
+%D       subtitle=Initialization,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+%D Experimental. This might change! Also, it might become a module
+%D instead if core code.
+
+\writestatus{loading}{ConTeXt XML Support / Goodies}
+
+\registerctxluafile{lxml-ctx}{}
+
+\unprotect
+
+\settrue \xmllshowbuffer
+\setfalse\xmllshowtitle
+\settrue \xmllshowwarning
+
+\definehead
+  [lshowtitle]
+  [subsubsubsubsubject]
+
+\setuphead
+  [lshowtitle]
+  [\c!style=\tta]
+
+\permanent\protected\def\xmllshow#1%
+  {\ctxlua{xml.ctx.tshow {
+        pattern = \!!bs\detokenize{#1}\!!es,
+    \ifconditional\xmllshowtitle
+        title = "lshowtitle",
+    \fi
+    \ifconditional\xmllshowwarning
+        warning = true,
+    \fi
+    } }}
+
+\permanent\protected\def\xmllshowbuffer#1#2#3%
+  {\ctxlua{xml.ctx.tshow {
+        pattern = \!!bs\detokenize{#2}\!!es,
+    \ifconditional\xmllshowbuffer
+        xmlroot   = "#1",
+        attribute = "#3",
+    \fi
+    \ifconditional\xmllshowwarning
+        warning = true,
+    \fi
+     } }}
+
+\protect
diff --git a/tex/context/base/mkiv/lxml-sor.mkxl b/tex/context/base/mkiv/lxml-sor.mkxl
new file mode 100644
index 000000000..798047e04
--- /dev/null
+++ b/tex/context/base/mkiv/lxml-sor.mkxl
@@ -0,0 +1,99 @@
+%D \module
+%D   [       file=lxml-sor,
+%D        version=2009.08.24,
+%D          title=\CONTEXT\ \XML\ Support,
+%D       subtitle=Sorting,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+%D THIS IS VERY EXPERIMENTAL!
+
+\writestatus{loading}{ConTeXt XML Support / Sorting}
+
+\registerctxluafile{lxml-sor}{}
+
+\unprotect
+
+%D The flusher is unexpandable so that it can be used in tables (noalign
+%D interferences).
+
+% todo: public implementors
+
+\permanent\protected\def\xmlresetsorter     #1{\ctxlxml{sorters.reset("#1")}}
+\permanent\protected\def\xmladdsortentry#1#2#3{\ctxlxml{sorters.add("#1","#2",\!!bs#3\!!es)}}
+\permanent\protected\def\xmlshowsorter      #1{\ctxlxml{sorters.show("#1")}}
+\permanent          \def\xmlflushsorter   #1#2{\ctxlxml{sorters.flush("#1","#2")}}
+\permanent\protected\def\xmlsortentries     #1{\ctxlxml{sorters.sort("#1")}}
+
+\protect \endinput
+
+\startbuffer[test]
+<demo>
+  <entry>
+    <category>one</category>
+    <key>alpha</key>
+    <content>alpha indeed</content>
+  </entry>
+  <entry>
+    <category>one</category>
+    <key>gamma</key>
+    <content>gamma indeed</content>
+  </entry>
+  <entry>
+    <category>one</category>
+    <key>beta</key>
+    <content>beta indeed</content>
+  </entry>
+  <entry>
+    <category>two</category>
+    <key>alpha</key>
+    <content>alpha again</content>
+  </entry>
+  <entry>
+    <category>two</category>
+    <key>gamma</key>
+    <content>gamma again</content>
+  </entry>
+  <entry>
+    <category>two</category>
+    <key>beta</key>
+    <content>beta again</content>
+  </entry>
+</demo>
+\stopbuffer
+
+\startxmlsetups xml:mysetups
+    \xmlsetsetup{\xmldocument}{demo|entry|content}{xml:*}
+\stopxmlsetups
+
+\xmlregistersetup{xml:mysetups}
+
+\startxmlsetups xml:demo
+    \xmlresetsorter{demo}
+    \xmlfilter{#1}{entry/command(xml:entry:getkeys)}
+    \blank sortkeys: \blank\xmlshowsorter{demo}\blank
+    \xmlsortentries{demo}
+    \xmlflushsorter{demo}{xml:entry:flush}
+\stopxmlsetups
+
+\startxmlsetups xml:entry:getkeys
+    \xmladdsortentry{demo}{#1}{\xmltext{#1}{category}}
+    \xmladdsortentry{demo}{#1}{\xmltext{#1}{key|entry}}
+\stopxmlsetups
+
+\startxmlsetups xml:entry:flush
+    \xmltext{#1}{content}\par
+\stopxmlsetups
+
+\startxmlsetups xml:entry
+    \xmltext{#1}{content}\par
+\stopxmlsetups
+
+\starttext
+    \xmlprocessbuffer{main}{test}{}
+\stoptext
diff --git a/tex/context/base/mkiv/math-frc.mkxl b/tex/context/base/mkiv/math-frc.mkxl
index 485053fa5..b232868cd 100644
--- a/tex/context/base/mkiv/math-frc.mkxl
+++ b/tex/context/base/mkiv/math-frc.mkxl
@@ -278,45 +278,128 @@
 
 % todo: store first state and reuse second time
 
+% \def\math_fraction_inner_normal#1#2%
+%   {\Ustack{%
+%      {%
+%        {\usemathstyleparameter\mathfractionparameter{\m_fractions_strut_top#1}}%
+%        \math_frac_command
+%        {\usemathstyleparameter\mathfractionparameter{\m_fractions_strut_bot#2}}%
+%      }%
+%    }%
+%    \math_frac_wrapup}
+%
+% \def\math_fraction_outer_normal#1#2%
+%   {\Ustack{%
+%      \usemathstyleparameter\mathfractionparameter
+%      {%
+%        {\m_fractions_strut_top#1}%
+%        \math_frac_command
+%        {\m_fractions_strut_bot#2}%
+%      }%
+%    }%
+%    \math_frac_wrapup}
+%
+% \def\math_fraction_both_normal#1#2%
+%   {\Ustack{%
+%      \usemathstyleparameter\mathfractionparameter
+%      {%
+%        {\usemathstyleparameter\mathfractionparameter\m_fractions_strut_top#1}%
+%        \math_frac_command
+%        {\usemathstyleparameter\mathfractionparameter\m_fractions_strut_bot#2}%
+%      }%
+%    }%
+%    \math_frac_wrapup}
+%
+% \def\math_fraction_inner_margin#1#2%
+%   {\Ustack{%
+%      {%
+%        {\kern\d_math_fraction_margin
+%         \usemathstyleparameter\mathfractionparameter{\m_fractions_strut_top#1}%
+%         \kern\d_math_fraction_margin}%
+%        \math_frac_command
+%        {\kern\d_math_fraction_margin
+%         \usemathstyleparameter\mathfractionparameter{\m_fractions_strut_bot#2}%
+%         \kern\d_math_fraction_margin}%
+%      }%
+%    }%
+%    \math_frac_wrapup}
+%
+% \def\math_fraction_outer_margin#1#2%
+%   {\Ustack{%
+%      \usemathstyleparameter\mathfractionparameter
+%      {%
+%        {\kern\d_math_fraction_margin
+%         \m_fractions_strut_top#1%
+%         \kern\d_math_fraction_margin}%
+%        \math_frac_command
+%        {\kern\d_math_fraction_margin
+%         \m_fractions_strut_bot#2%
+%         \kern\d_math_fraction_margin}%
+%      }%
+%    }%
+%    \math_frac_wrapup}
+%
+% \def\math_fraction_both_margin#1#2%
+%   {\Ustack{%
+%      \usemathstyleparameter\mathfractionparameter
+%      {%
+%        {\kern\d_math_fraction_margin
+%         \usemathstyleparameter\mathfractionparameter\m_fractions_strut_top#1%
+%         \kern\d_math_fraction_margin}%
+%        \math_frac_command
+%        {\kern\d_math_fraction_margin
+%         \usemathstyleparameter\mathfractionparameter\m_fractions_strut_bot#2%
+%         \kern\d_math_fraction_margin}%
+%      }%
+%    }%
+%    \math_frac_wrapup}
+
+\def\math_frac_command_u
+  {\clf_umathfraction
+     {\mathfractionparameter\c!rule}%
+     \ifx\p_math_fraction_fences\empty
+       \mathfractionparameter\c!left \space
+       \mathfractionparameter\c!right\space
+     \else
+       \math_frac_no_delim\space
+       \math_frac_no_delim\space
+     \fi
+     \dimexpr\mathfractionparameter\c!rulethickness\relax
+   \relax}
+
 \def\math_fraction_inner_normal#1#2%
-  {\Ustack{%
-     {%
+  {\Ustack{% forces num style
+     \math_frac_command_u
        {\usemathstyleparameter\mathfractionparameter{\m_fractions_strut_top#1}}%
-       \math_frac_command
        {\usemathstyleparameter\mathfractionparameter{\m_fractions_strut_bot#2}}%
-     }%
    }%
    \math_frac_wrapup}
 
 \def\math_fraction_outer_normal#1#2%
-  {\Ustack{%
+  {\Ustack{% forces num style
      \usemathstyleparameter\mathfractionparameter
-     {%
+     \math_frac_command_u
        {\m_fractions_strut_top#1}%
-       \math_frac_command
        {\m_fractions_strut_bot#2}%
-     }%
    }%
    \math_frac_wrapup}
 
 \def\math_fraction_both_normal#1#2%
-  {\Ustack{%
+  {\Ustack{% forces num style
      \usemathstyleparameter\mathfractionparameter
-     {%
+     \math_frac_command_u
        {\usemathstyleparameter\mathfractionparameter\m_fractions_strut_top#1}%
-       \math_frac_command
        {\usemathstyleparameter\mathfractionparameter\m_fractions_strut_bot#2}%
-     }%
    }%
    \math_frac_wrapup}
 
 \def\math_fraction_inner_margin#1#2%
   {\Ustack{%
      {%
+       \math_frac_command_u
        {\kern\d_math_fraction_margin
         \usemathstyleparameter\mathfractionparameter{\m_fractions_strut_top#1}%
         \kern\d_math_fraction_margin}%
-       \math_frac_command
        {\kern\d_math_fraction_margin
         \usemathstyleparameter\mathfractionparameter{\m_fractions_strut_bot#2}%
         \kern\d_math_fraction_margin}%
@@ -328,10 +411,10 @@
   {\Ustack{%
      \usemathstyleparameter\mathfractionparameter
      {%
+       \math_frac_command_u
        {\kern\d_math_fraction_margin
         \m_fractions_strut_top#1%
         \kern\d_math_fraction_margin}%
-       \math_frac_command
        {\kern\d_math_fraction_margin
         \m_fractions_strut_bot#2%
         \kern\d_math_fraction_margin}%
@@ -343,10 +426,10 @@
   {\Ustack{%
      \usemathstyleparameter\mathfractionparameter
      {%
+       \math_frac_command_u
        {\kern\d_math_fraction_margin
         \usemathstyleparameter\mathfractionparameter\m_fractions_strut_top#1%
         \kern\d_math_fraction_margin}%
-       \math_frac_command
        {\kern\d_math_fraction_margin
         \usemathstyleparameter\mathfractionparameter\m_fractions_strut_bot#2%
         \kern\d_math_fraction_margin}%
diff --git a/tex/context/base/mkiv/math-inc.lua b/tex/context/base/mkiv/math-inc.lua
index 010d29a35..7c32adde6 100644
--- a/tex/context/base/mkiv/math-inc.lua
+++ b/tex/context/base/mkiv/math-inc.lua
@@ -20,6 +20,8 @@ local undent = buffers.undent
 local f_entity = string.formatters["&x%X;"]
 local f_blob   = string.formatters['<?xml version="2.0"?>\n\n<!-- formula %i -->\n\n%s']
 
+local report_tags = logs.reporter("structure","tags")
+
 local all  = nil
 local back = nil
 
@@ -62,7 +64,12 @@ local function getblob(n)
             local root  = xml.load(full)
             for c in xml.collected(root,"formulacontent") do
                 local index = tonumber(c.at.n)
-                all[index] = f_blob(index,beautify(xmltext(c,"math") or ""))
+                local data  = beautify(xmltext(c,"math") or "")
+                if index and data then
+                    all[index] = f_blob(index,data)
+                else
+                    report_tags("no formula content id")
+                end
             end
             local it = mathematics.alphabets.regular.it
             for k, v in next, it.digits    do back[v] = k end
diff --git a/tex/context/base/mkiv/math-stc.mklx b/tex/context/base/mkiv/math-stc.mklx
index 2017fec1d..1ee8e85a2 100644
--- a/tex/context/base/mkiv/math-stc.mklx
+++ b/tex/context/base/mkiv/math-stc.mklx
@@ -1167,18 +1167,18 @@
 \definemathunderextensible [\v!bottom] [underrightharpoondown]  ["21C1]
 \definemathunderextensible [\v!bottom] [underrightharpoonup]    ["21C0]
 
-% We don't use overline and underline. This is one of the overlooked aspects of
-% unicode cq. opentype math: why treat rules different than e.g. arrows and
-% accents. It is a bit unfortunate that the opportunity to move math to new
-% technologies happened outside the tex domain (and/or some aspects were kept while
-% in fact they were side effects of limitations of traditional fonts). From the
-% unicode aware tex engines' implementation point of view things could have been
-% done a bit nicer but then: the community didn't seem to care too much and just
-% has to follow now.
-%
-% Anyhow, we use a character based approach so that at least we get unicode stuff
-% in the backend (okay, we still need to deal with some cut and paste issues but at
-% least we now know what we deal with.
+%D We don't use overline and underline. This is one of the overlooked aspects of
+%D unicode cq. opentype math: why treat rules different than e.g. arrows and
+%D accents. It is a bit unfortunate that the opportunity to move math to new
+%D technologies happened outside the tex domain (and/or some aspects were kept while
+%D in fact they were side effects of limitations of traditional fonts). From the
+%D unicode aware tex engines' implementation point of view things could have been
+%D done a bit nicer but then: the community didn't seem to care too much and just
+%D has to follow now.
+%D
+%D Anyhow, we use a character based approach so that at least we get unicode stuff
+%D in the backend (okay, we still need to deal with some cut and paste issues but at
+%D least we now know what we deal with.
 
 % alternatively we can move the original to FE*
 
@@ -1202,19 +1202,19 @@
 
 %D For mathml:
 
-\definemathdoubleextensible     [\v!both]     [overbarunderbar]         ["FE33E] ["FE33F]
-\definemathdoubleextensible     [\v!both]     [overbraceunderbrace]     ["FE3DE] ["FE3DF]
-\definemathdoubleextensible     [\v!both]     [overparentunderparent]   ["FE3DC] ["FE3DD]
-\definemathdoubleextensible     [\v!both]     [overbracketunderbracket] ["FE3B4] ["FE3B5]
+\definemathdoubleextensible    [\v!both]     [overbarunderbar]         ["FE33E] ["FE33F]
+\definemathdoubleextensible    [\v!both]     [overbraceunderbrace]     ["FE3DE] ["FE3DF]
+\definemathdoubleextensible    [\v!both]     [overparentunderparent]   ["FE3DC] ["FE3DD]
+\definemathdoubleextensible    [\v!both]     [overbracketunderbracket] ["FE3B4] ["FE3B5]
 
-\definemathovertextextensible   [\v!bothtext] [overbartext]             ["FE33E]
-\definemathundertextextensible  [\v!bothtext] [underbartext]                     ["FE33F]
-\definemathovertextextensible   [\v!bothtext] [overbracetext]           ["FE3DE]
-\definemathundertextextensible  [\v!bothtext] [underbracetext]                   ["FE3DF]
-\definemathovertextextensible   [\v!bothtext] [overparenttext]          ["FE3DC]
-\definemathundertextextensible  [\v!bothtext] [underparenttext]                  ["FE3DD]
-\definemathovertextextensible   [\v!bothtext] [overbrackettext]         ["FE3B4]
-\definemathundertextextensible  [\v!bothtext] [underbrackettext]                 ["FE3B5]
+\definemathovertextextensible  [\v!bothtext] [overbartext]             ["FE33E]
+\definemathundertextextensible [\v!bothtext] [underbartext]                     ["FE33F]
+\definemathovertextextensible  [\v!bothtext] [overbracetext]           ["FE3DE]
+\definemathundertextextensible [\v!bothtext] [underbracetext]                   ["FE3DF]
+\definemathovertextextensible  [\v!bothtext] [overparenttext]          ["FE3DC]
+\definemathundertextextensible [\v!bothtext] [underparenttext]                  ["FE3DD]
+\definemathovertextextensible  [\v!bothtext] [overbrackettext]         ["FE3B4]
+\definemathundertextextensible [\v!bothtext] [underbrackettext]                 ["FE3B5]
 
 %D Some bonus ones (for the moment here):
 
@@ -1302,14 +1302,26 @@
 \defineextensiblefiller [Leftrightarrowfill]     ["27FA]
 %\defineextensiblefiller[Rightleftarrowfill]     [.....]
 
-%defineextensiblefiller [overbarfill]            ["FE33E] % untested
-%defineextensiblefiller [underbarfill]           ["FE33F] % untested
-\defineextensiblefiller [overbracefill]          ["FE3DE] % untested
-\defineextensiblefiller [underbracefill]         ["FE3DF] % untested
-\defineextensiblefiller [overparentfill]         ["FE3DC] % untested
-\defineextensiblefiller [underparentfill]        ["FE3DD] % untested
-\defineextensiblefiller [overbracketfill]        ["FE3B4] % untested
-\defineextensiblefiller [underbracketfill]       ["FE3B5] % untested
+% These are fishy ... we need to check this because now these commands relax (there
+% are some entries in char-def.)
+%
+% %definemathoverextensible  [overbarfill]      ["FE33E]
+% %definemathunderextensible [underbarfill]     ["FE33F]
+% \definemathoverextensible  [overbracefill]    ["FE3DE]
+% \definemathunderextensible [underbracefill]   ["FE3DF]
+% \definemathoverextensible  [overparentfill]   ["FE3DC]
+% \definemathunderextensible [underparentfill]  ["FE3DD]
+% \definemathoverextensible  [overbracketfill]  ["FE3B4]
+% \definemathunderextensible [underbracketfill] ["FE3B5]
+%
+% %defineextensiblefiller [overbarfill]      ["FE33E]
+% %defineextensiblefiller [underbarfill]     ["FE33F]
+% \defineextensiblefiller [overbracefill]    ["FE3DE]
+% \defineextensiblefiller [underbracefill]   ["FE3DF]
+% \defineextensiblefiller [overparentfill]   ["FE3DC]
+% \defineextensiblefiller [underparentfill]  ["FE3DD]
+% \defineextensiblefiller [overbracketfill]  ["FE3B4]
+% \defineextensiblefiller [underbracketfill] ["FE3B5]
 
 %D Extra:
 
diff --git a/tex/context/base/mkiv/mult-low.lua b/tex/context/base/mkiv/mult-low.lua
index e72c3ab22..be507394d 100644
--- a/tex/context/base/mkiv/mult-low.lua
+++ b/tex/context/base/mkiv/mult-low.lua
@@ -161,7 +161,7 @@ return {
         "automaticpenaltyhyphenationmodecode", "explicitpenaltyhyphenationmodecode",
         "permitgluehyphenationmodecode", "permitallhyphenationmodecode", "permitmathreplacehyphenationmodecode",
         --
-        "normalizelinemodecode", "indentskipmodecode", "swaphangindentmodecode", "swapparskipmodecode", "breakafterdirmodecode",
+        "normalizelinecode", "parindentskipcode", "swaphangindentcode", "swapparsshapecode", "breakafterdircode", "removemarginkernscode",
         --
         "noligaturingcode", "nokerningcode", "noleftligaturecode", "noleftkerncode", "norightligaturecode", "norightkerncode",
         "noexpansioncode", "noprotrusioncode",
@@ -257,6 +257,10 @@ return {
         "scratchbox", "globalscratchbox", "privatescratchbox",
         "scratchmacro", "scratchmacroone", "scratchmacrotwo",
         --
+        "scratchconditiontrue", "scratchconditionfalse", "ifscratchcondition",
+        "scratchconditiononetrue", "scratchconditiononefalse", "ifscratchconditionone",
+        "scratchconditiontwotrue", "scratchconditiontwofalse", "ifscratchconditiontwo",
+        --
         "globalscratchcounterone", "globalscratchcountertwo", "globalscratchcounterthree",
         --
         "groupedcommand", "groupedcommandcs",
diff --git a/tex/context/base/mkiv/mult-prm.lua b/tex/context/base/mkiv/mult-prm.lua
index 1ab4e6aba..3d0f65dba 100644
--- a/tex/context/base/mkiv/mult-prm.lua
+++ b/tex/context/base/mkiv/mult-prm.lua
@@ -393,6 +393,7 @@ return {
   "outputbox",
   "overloaded",
   "overloadmode",
+  "parametercount",
   "parattr",
   "pardirection",
   "permanent",
diff --git a/tex/context/base/mkiv/node-bck.mkxl b/tex/context/base/mkiv/node-bck.mkxl
new file mode 100644
index 000000000..e37d65b1c
--- /dev/null
+++ b/tex/context/base/mkiv/node-bck.mkxl
@@ -0,0 +1,92 @@
+%D \module
+%D   [       file=node-bck,
+%D        version=2009.06.08,
+%D          title=\CONTEXT\ Node Macros,
+%D       subtitle=Backgrounds,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Node Support / Backgrounds}
+
+%D This is first attempt to replacing backgrounds in a few tables
+%D mechanisms. When used more frequently, we can store the color
+%D spec in the attribute.
+
+\unprotect
+
+\registerctxluafile{node-bck}{optimize}
+
+% \backgroundvbox[green] {\input tufte } \par
+% \backgroundvbox[blue]  {\input ward } \par
+% \backgroundvbox[red]   {\input knuth } \par
+% \backgroundhbox[yellow]{\rotate[rotation=45]{hello world}} \par
+
+\permanent\def\colorattr#1%
+  {\ifcsname\??colorattribute\currentcolorprefix#1\endcsname
+     \node_backgrounds_thecolorattr{\currentcolorprefix#1}%
+   \orelse\ifcsname\??colorattribute#1\endcsname
+     \node_backgrounds_thecolorattr{#1}%
+   \fi}
+
+\def\node_backgrounds_thecolorattr#1%
+  {attr \colormodelattribute   \c_attr_colormodel
+   attr \colorattribute        \lastnamedcs
+   attr \transparencyattribute \thetransparencyattribute{#1} } % can be optimized
+
+\permanent\def\thecolorattr#1%
+  {attr \colormodelattribute   \c_attr_colormodel
+   attr \colorattribute        \csname\??colorattribute#1\endcsname
+   attr \transparencyattribute \thetransparencyattribute{#1} } % can be optimized
+
+\permanent\def\backgroundcolorattr#1%
+  {\ifcsname\??colorattribute\currentcolorprefix#1\endcsname
+     \node_backgrounds_thebackgroundcolorattr{\currentcolorprefix#1}%
+   \orelse\ifcsname\??colorattribute#1\endcsname
+     \node_backgrounds_thebackgroundcolorattr{#1}%
+   \fi}
+
+\permanent\def\thebackgroundcolorattr#1%
+  {attr \backgroundattribute      \plusone
+   attr \colormodelattribute      \c_attr_colormodel
+   attr \colorattribute           \csname\??colorattribute#1\endcsname
+   attr \transparencyattribute    \thetransparencyattribute{#1} } % can be optimized
+
+\def\node_backgrounds_thebackgroundcolorattr#1%
+  {attr \backgroundattribute      \plusone
+   attr \colormodelattribute      \c_attr_colormodel
+   attr \colorattribute           \lastnamedcs
+   attr \transparencyattribute    \thetransparencyattribute{#1} } % can be optimized
+
+\permanent\def\thealignbackgroundcolorattr#1%
+  {attr \alignbackgroundattribute \plusone
+   attr \colormodelattribute      \c_attr_colormodel
+   attr \colorattribute           \csname\??colorattribute#1\endcsname
+   attr \transparencyattribute    \thetransparencyattribute{#1} } % can be optimized
+
+\permanent\protected\def\backgroundhbox{\node_backgrounds_boxes_add\hbox}
+\permanent\protected\def\backgroundvbox{\node_backgrounds_boxes_add\vbox}
+\permanent\protected\def\backgroundvtop{\node_backgrounds_boxes_add\vtop}
+\permanent\protected\def\backgroundline{\dontleavehmode\node_backgrounds_boxes_add\hbox}
+
+% \def\node_backgrounds_boxes_add#1[#2]%
+%   {\begingroup
+%    \clf_enablebackgroundboxes
+%    \dousecolorparameter{#2}%
+%    \normalexpanded{\endgroup#1
+%      attr \backgroundattribute   \plusone
+%      attr \colormodelattribute   \the\c_attr_colormodel
+%      attr \colorattribute        \the\c_attr_color
+%      attr \transparencyattribute \the\c_attr_transparency}}
+%
+% more efficient:
+
+\def\node_backgrounds_boxes_add#1[#2]%
+  {\clf_enablebackgroundboxes
+   #1\backgroundcolorattr{#2}}
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/node-rul.mkxl b/tex/context/base/mkiv/node-rul.mkxl
new file mode 100644
index 000000000..3697e92ef
--- /dev/null
+++ b/tex/context/base/mkiv/node-rul.mkxl
@@ -0,0 +1,618 @@
+%D \module
+%D   [       file=node-rul,
+%D        version=2009.11.03, % 1995.10.10,
+%D          title=\CONTEXT\ Core Macros,
+%D       subtitle=Bars,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+% todo: ex and and em traveling with attribute
+% todo: this will move to typo-rul + ctxcommands
+
+\writestatus{loading}{ConTeXt Core Macros / Bars}
+
+%D \macros
+%D   {underbar,underbars,
+%D    overbar,overbars,
+%D    overstrike,overstrikes,
+%D    setupbar}
+%D
+%D In the rare case that we need undelined words, for instance because all font
+%D alternatives are already in use, one can use \type {\underbar} and \type
+%D {\overstrike} and their plural forms.
+%D
+%D \startbuffer
+%D \underbars {drawing \underbar{bars} under words is a typewriter leftover}
+%D \overstrikes {striking words makes them \overstrike {unreadable} but
+%D sometimes even \overbar {top lines} come into view.}
+%D \stopbuffer
+%D
+%D \typebuffer
+%D
+%D \startlines
+%D \getbuffer
+%D \stoplines
+%D
+%D The formal definitions are:
+%D
+%D \showsetup{underbar}
+%D \showsetup{underbars}
+%D \showsetup{overbar}
+%D \showsetup{overbars}
+%D \showsetup{overstrike}
+%D \showsetup{overstrikes}
+%D
+%D \showsetup{setupbars}
+%D
+%D Units can be any normal \TEX\ unit:
+%D
+%D \startbuffer
+%D \setupbars[unit=mm,rulethickness=1]     bar\startbar[underbar]foo\stopbar bar\blank
+%D \setupbars[unit=ex,rulethickness=1]     bar\startbar[underbar]foo\stopbar bar\blank
+%D \setupbars[unit=pt,rulethickness=1]     bar\startbar[underbar]foo\stopbar bar\blank
+%D \setupbars[unit=pt,rulethickness=10pt]  bar\startbar[underbar]foo\stopbar bar
+%D \stopbuffer
+%D
+%D \typebuffer \blank \getbuffer \blank
+%D
+%D As with many early usage of \LUA\ in \MKIV\ this mechanism explores a way
+%D to deal with local settings at the \TEX\ end and remembering parameters
+%D at the \LUA\ end. We might do things differently now, but as settings normally
+%D don't change that often, we're not in a hurry to do that now. The problem at
+%D the \LUA\ end is that we don't know when to clean up.
+
+\unprotect
+
+%definesystemattribute[ruled]
+%definesystemattribute[shifted]
+
+\registerctxluafile{node-rul}{optimize}
+
+\installcorenamespace{bar}
+\installcorenamespace{barindex}
+\installcorenamespace{barattribute}
+\installcorenamespace{barstack}
+
+\installcommandhandler \??bar {bar} \??bar
+
+\newtoks\t_node_rules_checklist
+
+\let\c_node_rules_index\relax % temporary synonym
+\let\p_node_rules_color\empty
+
+\aliased\let\setupbars\setupbar
+
+\appendtoks
+    \ifsecondargument
+        \node_rules_define
+    \else
+        \the\t_node_rules_checklist
+    \fi
+\to \everysetupbar
+
+\appendtoks
+    \ifcsname\??barindex\currentbar\endcsname
+        \lastnamedcs\zerocount
+    \else
+        \expandafter\newcount\csname\??barindex\currentbar\endcsname
+    \fi
+  % \normalexpanded{\t_node_rules_checklist{\node_rules_redefine{\currentbar}\the\t_node_rules_checklist}}%
+    \normalexpanded{\t_node_rules_checklist{\the\t_node_rules_checklist\relax\node_rules_redefine{\currentbar}}}%
+  % \etoksapp\t_node_rules_checklist{\node_rules_redefine{\currentbar}}%
+    \node_rules_define
+    \frozen\instance\setuevalue\currentbar{\node_rules_direct{\currentbar}}%
+\to \everydefinebar
+
+\newbox\b_node_rules
+
+\protected\def\node_rules_define
+  {\edef\p_node_rules_color{\barparameter\c!color}%
+   \edef\p_node_text{\barparameter\c!text}%
+   \ifx\p_node_text\empty\else
+     \setbox\b_node_rules\hbox{\p_node_text}%
+   \fi
+   \setevalue{\??barattribute\currentbar}{\number
+     \clf_definerule
+        continue      {\barparameter\c!continue}%
+        unit          {\barparameter\c!unit}%
+        order         {\barparameter\c!order}%
+        rulethickness {\barparameter\c!rulethickness}%
+        method        \barparameter\c!method
+        max           \barparameter\c!max\space % number
+        mp           {\includeMPgraphic{\barparameter\c!mp}}
+        ma            \thecolormodelattribute
+        ca            \thecolorattribute\p_node_rules_color
+        ta            \thetransparencyattribute\p_node_rules_color
+        offset        \barparameter\c!offset\space % number
+        dy            \barparameter\c!dy\space % number
+        empty        {\barparameter\c!empty}%
+     \ifx\p_node_text\empty\else
+        % not that useful and efficient, more for testing something
+        text         \b_node_rules
+        repeat       {\barparameter\c!repeat}%
+     \fi
+     \relax}}
+
+\protected\def\node_rules_redefine#1%
+  {\def\currentbar{#1}\node_rules_define}
+
+\protected\def\node_rules_direct#1%
+  {\groupedcommand
+     {\node_rules_set{#1}\barparameter\c!left}%
+     {\relax\barparameter\c!right}}
+
+\permanent\protected\def\inlinebar[#1]%
+  {\node_rules_direct{#1}}
+
+% \protected\def\inlinecurrentbar
+%   {\node_rules_direct{\currentbar}}
+
+% store in properties
+
+\permanent\protected\def\node_rules_set#1% maybe reverse the 1000 (also maybe use more attributes instead of settings)
+  {\edef\currentbar{#1}%
+   \usebarstyleandcolor\c!foregroundstyle\c!foregroundcolor
+   % maybe: \usebarstyleandcolor\c!textgroundstyle\c!textcolor
+   % todo: move this to lua .. we callout anyway
+   \expandafter\let\expandafter\c_node_rules_index\csname\??barindex#1\endcsname
+   \advance\c_node_rules_index\plusone
+   \clf_enablerules % will be relaxed
+   \c_attr_ruled\numexpr
+      \plusthousand*\c_node_rules_index
+      % optimizing this one needs testing
+     +\csname\??barattribute#1\ifcsname\??bar#1:\number\c_node_rules_index\s!parent\endcsname:\number\c_node_rules_index\fi\endcsname
+   \relax}
+
+\permanent\protected\def\resetbar
+  {\c_attr_ruled\attributeunsetvalue}
+
+\permanent\protected\def\nobar
+  {\groupedcommand
+     {\resetbar\barparameter\c!left}%
+     {\relax\barparameter\c!right}}
+
+\permanent\protected\def\startbar[#1]%
+  {\begingroup
+   \node_rules_set{#1}%
+   \ignorespaces
+   \barparameter\c!left}
+
+\permanent\protected\def\stopbar
+  {\removeunwantedspaces
+   \barparameter\c!right
+   \endgroup}
+
+\permanent\protected\def\setbar[#1]%
+  {\node_rules_set{#1}}
+
+\aliased\let\directsetbar\node_rules_set
+
+% ungrouped
+
+\newcount\c_node_rules_nesting % todo: same as colors
+
+\permanent\protected\def\pushbar[#1]%
+  {\global\advance\c_node_rules_nesting\plusone
+   \expandafter\edef\csname\??barstack\number\c_node_rules_nesting\endcsname{\c_attr_ruled\the\c_attr_ruled}%
+   \node_rules_set{#1}}
+
+\permanent\protected\def\popbar
+  {\csname\??barstack\number\c_node_rules_nesting\endcsname
+   \global\advance\c_node_rules_nesting\minusone}
+
+\setupbars
+  [\c!method=0,                 % new: 0=center nested, 1=stack nested
+   \c!continue=\v!no,
+   \c!empty=,                   % new: yes = hide text
+   \c!offset=0,                 % upwards, replaces: topoffset bottomoffset
+   \c!dy=0,
+   \c!max=3,
+   \c!style=,
+   \c!rulethickness=.1,
+   \c!order=\v!foreground,
+   \c!unit=ex,                  % so now we are relative
+   \c!color=]                   % replaces: rulecolor
+
+% \definebar[touchbar]    [\c!method=0,\c!dy=-0.4,\c!offset=-0.0]
+% \definebar[touchbars]   [touchbar]   [\c!continue=\v!yes]
+
+\pushoverloadmode
+
+\aliased\let\normalmathoverbar    \overbar
+\aliased\let\normalmathunderbar   \underbar
+\aliased\let\normalmathoverstrike \overstrike
+\aliased\let\normalmathunderstrike\understrike
+
+\definebar[\v!overbar]   [\c!method=1,\c!dy=0.4,\c!offset=1.8,\c!continue=\v!yes]
+\definebar[\v!underbar]  [\c!method=1,\c!dy=-0.4,\c!offset=-0.3,\c!continue=\v!yes]
+\definebar[\v!overstrike][\c!method=0,\c!dy=0.4,\c!offset=0.5,\c!continue=\v!yes]
+
+\definebar
+  [\v!understrike]
+  [\c!method=0,
+   \c!offset=1.375,
+   \c!rulethickness=2.5,
+   \c!continue=\v!yes,
+   \c!order=\v!background,
+   \c!color=lightgray]
+
+\definebar[\v!overbars]    [\v!overbar]    [\c!continue=\v!no]
+\definebar[\v!underbars]   [\v!underbar]   [\c!continue=\v!no]
+\definebar[\v!overstrikes] [\v!overstrike] [\c!continue=\v!no]
+\definebar[\v!understrikes][\v!understrike][\c!continue=\v!no]
+
+\definebar
+  [\v!hiddenbar]
+  [\v!underbar]
+  [\c!continue=\v!yes,
+   \c!empty=\v!yes,
+   \c!left=\zwj,
+   \c!right=\zwj]
+
+% \setupbar[\v!overstrike][continue=all]
+
+% we want these always so ...
+
+\ifdefined\normalmathunderbar
+    \enforced\permanent\expandafter\let\expandafter\normaltextunderbar\csname\v!underbar\endcsname
+    \enforced\permanent\protected\def\underbar{\mathortext\normalmathunderbar\normaltextunderbar}
+\else
+    \enforced\permanent\expandafter\let\expandafter\underbar\csname\v!underbar\endcsname
+\fi
+
+\ifdefined\normalmathoverbar
+    \enforced\permanent\expandafter\let\expandafter\normaltextoverbar\csname\v!overbar\endcsname
+    \enforced\permanent\protected\def\overbar{\mathortext\normalmathoverbar\normaltextoverbar}
+\else
+    \enforced\permanent\expandafter\let\expandafter\overbar\csname\v!overbar\endcsname
+\fi
+
+\ifdefined\normalmathunderstrike
+    \enforced\permanent\expandafter\let\expandafter\normaltextunderstrike\csname\v!understrike\endcsname
+    \enforced\permanent\protected\def\understrike{\mathortext\normalmathunderstrike\normaltextunderstrike}
+\else
+    \enforced\permanent\expandafter\let\expandafter\understrike\csname\v!understrike\endcsname
+\fi
+
+\ifdefined\normalmathoverstrike
+    \enforced\permanent\expandafter\let\expandafter\normaltextoverstrike\csname\v!overstrike\endcsname
+    \enforced\permanent\protected\def\overstrike{\mathortext\normalmathoverstrike \normaltextoverstrike}
+\else
+    \enforced\permanent\expandafter\let\expandafter\overstrike\csname\v!overstrike\endcsname
+\fi
+
+\enforced\permanent\expandafter\let\expandafter\overstrikes\csname\v!overstrikes\endcsname
+\enforced\permanent\expandafter\let\expandafter\underbars  \csname\v!underbars  \endcsname
+\enforced\permanent\expandafter\let\expandafter\overbars   \csname\v!overbars   \endcsname
+
+\enforced\permanent\protected\def\setupunderbar[#1]% too incompatible for the moment
+  {}
+
+\popoverloadmode
+
+%D An experimental new feature:
+%D
+%D \startbuffer
+%D test {\red\underrandoms{test me}} and \underrandom{test} or \underrandom{grep} \blank
+%D test {\red\underdashes {test me}} and \underdash  {test} or \underdash  {grep} \blank
+%D test {\red\underdots   {test me}} and \underdot   {test} or \underdot   {grep} \blank
+%D \stopbuffer
+%D
+%D \typebuffer \getbuffer
+
+\startuseMPgraphic{rules:under:random}
+    draw
+        ((0,RuleDepth) ... (RuleWidth,RuleDepth)) randomized (4*RuleThickness)
+        shifted (0,RuleFactor*RuleOffset)
+        withpen pencircle scaled RuleThickness
+        withcolor RuleColor ;
+    setbounds currentpicture to unitsquare xysized(RuleWidth,RuleHeight) ;
+\stopuseMPgraphic
+
+\startuseMPgraphic{rules:under:dash}
+    draw
+        ((0,RuleDepth) -- (RuleWidth,RuleDepth))
+        shifted (0,RuleFactor*RuleOffset)
+        dashed dashpattern(on RuleFactor/2 off RuleFactor/2)
+        withpen pencircle scaled RuleThickness
+        withcolor RuleColor ;
+    setbounds currentpicture to unitsquare xysized(RuleWidth,RuleHeight) ;
+\stopuseMPgraphic
+
+\startuseMPgraphic{rules:under:dots}
+    path p ; p := (0,RuleDepth) -- (RuleWidth,RuleDepth) ;
+    numeric l ; l := arclength(p);
+    l := l mod RuleThickness/4;
+    draw
+        p
+        shifted (l,RuleFactor*RuleOffset)
+        dashed dashpattern(off 2RuleThickness+l on 0 off 2RuleThickness)
+        withpen pencircle scaled 2RuleThickness
+        withcolor RuleColor ;
+    setbounds currentpicture to unitsquare xysized(RuleWidth,RuleHeight) ;
+\stopuseMPgraphic
+
+\definebar
+  [undergraphic]
+  [\c!mp=rules:under:dash,
+   \c!offset=-.2,
+   \c!order=\v!background]
+
+\definebar[underrandom] [undergraphic][\c!mp=rules:under:random]
+\definebar[underrandoms][underrandom] [\c!continue=\v!yes]
+
+\definebar[underdash]   [undergraphic][\c!mp=rules:under:dash]
+\definebar[underdashes] [underdash]   [\c!continue=\v!yes]
+
+\definebar[underdot]    [undergraphic][\c!mp=rules:under:dots]
+\definebar[underdots]   [underdot]    [\c!continue=\v!yes]
+
+%D This will move: (a bit duplicated)
+
+\installcorenamespace{shift}
+\installcorenamespace{shiftindex}
+\installcorenamespace{shiftattribute}
+
+\installcommandhandler \??shift {shift} \??shift
+
+\newtoks\t_node_shifts_checklist
+
+\let\c_node_shifts_index\relax % temporary synonym
+
+\let\setupshifts\setupshift
+
+\appendtoks
+    \ifsecondargument
+        \node_shifts_define
+    \else
+        \the\t_node_shifts_checklist
+    \fi
+\to \everysetupshift
+
+\appendtoks
+    \ifcsname\??shiftindex\currentshift\endcsname
+        \lastnamedcs\zerocount
+    \else
+        \expandafter\newcount\csname\??shiftindex\currentshift\endcsname
+    \fi
+    \normalexpanded{\t_node_shifts_checklist{\the\t_node_shifts_checklist\node_shifts_redefine{\currentshift}}}% order ?
+    \node_shifts_define
+    \setuevalue\currentshift{\node_shifts_direct{\currentshift}}%
+\to \everydefineshift
+
+\protected\def\node_shifts_define
+  {\setevalue{\??shiftattribute\currentshift}{\number
+   \clf_defineshift
+     continue {\shiftparameter\c!continue}%
+     unit     {\shiftparameter\c!unit}%
+     method    \shiftparameter\c!method
+     dy        \shiftparameter\c!dy % number
+   \relax}}
+
+\protected\def\node_shifts_redefine#1%
+  {\def\currentshift{#1}\node_shifts_define}
+
+% \protected\def\node_shifts_set
+%   {\clf_enableshifts
+%    \glet\node_shifts_set\node_shifts_set_indeed
+%    \node_shifts_set}
+%
+% \def\node_shifts_set_indeed#1% todo: check parent !
+
+\protected\def\node_shifts_set#1% todo: check parent ! todo: move attr etc to lua
+  {\def\currentshift{#1}%
+   \expandafter\let\expandafter\c_node_shifts_index\csname\??shiftindex#1\endcsname
+   \advance\c_node_shifts_index\plusone
+   \clf_enableshifts % will be relaxed
+   \c_attr_shifted\numexpr
+      \plusthousand*\c_node_shifts_index
+     +\csname\??shiftattribute#1\ifcsname\??shift#1:\number\c_node_shifts_index\s!parent\endcsname:\number\c_node_shifts_index\fi\endcsname
+   \relax
+   \useshiftstyleandcolor\c!style\c!color
+   \dosetupisolatedalign{\shiftparameter\c!align}} % weird feature that i probably needed once
+
+\protected\def\startshift[#1]%
+  {\begingroup
+   \node_shifts_set{#1}%
+   \ignorespaces}
+
+\protected\def\stopshift
+  {\removeunwantedspaces
+   \endgroup}
+
+% \protected\def\node_shifts_direct#1%
+%   {\doisolatedgroupedalign{\node_shifts_set{#1}}\donothing}
+
+\protected\def\node_shifts_direct#1%
+  {\groupedcommand
+     {\begingroup\dostartisolation\begingroup\node_shifts_set{#1}\ignorespaces}
+     {\removeunwantedspaces\endgroup\dostopisolation\endgroup}}
+
+\setupshifts
+  [\c!method=0,
+   \c!continue=\v!no,
+   \c!dy=0,
+   \c!unit=ex,
+   \c!align=,
+   \c!style=,
+   \c!color=]
+
+\defineshift [\v!shiftup]   [\c!method=0,\c!dy=-1,\c!unit=ex,\c!continue=\v!yes,\c!style=\txx,\c!color=]
+\defineshift [\v!shiftdown] [\c!method=1,\c!dy=.3,\c!unit=ex,\c!continue=\v!yes,\c!style=\txx,\c!color=]
+
+% we want these always so ...
+
+\expandafter\let\expandafter\shiftup   \csname\v!shiftup   \endcsname
+\expandafter\let\expandafter\shiftdown \csname\v!shiftdown \endcsname
+
+% This is a weird helper:
+
+\protected\def\dostartisolation{\signalcharacter}
+\protected\def\dostopisolation {\signalcharacter}
+\protected\def\doisolator      {\signalcharacter}
+
+\protected\def\dosetupisolatedalign#1%
+  {\doisolator
+   \setupalign[#1]\relax}
+
+\protected\def\doisolatedgroupedalign#1#2%
+  {\groupedcommand
+     {\begingroup\dostartisolation\begingroup#1}
+     {#2\endgroup\dostopisolation\endgroup}}
+
+%D More rules.
+
+% The following code rocks and was written with the Toto Live in Poland bluray
+% in loop mode on my 5.1 surround development setup (the Toto lineup with Simon
+% Phillips on drums). The Amsterdam concert is equally energizing.
+
+\installcorenamespace{linefiller}
+\installcorenamespace{linefillerindex}
+\installcorenamespace{linefillerattribute}
+
+\installcommandhandler \??linefiller {linefiller} \??linefiller
+
+\definesystemattribute[linefiller][public]
+
+\newtoks\t_node_linefiller_checklist
+
+\let\c_node_linefiller_index\relax % temporary synonym
+
+\aliased\let\setuplinefillers\setuplinefiller
+
+\appendtoks
+    \ifsecondargument
+        \node_linefiller_define
+    \else
+        \the\t_node_linefiller_checklist
+    \fi
+\to \everysetuplinefiller
+
+\appendtoks
+    \ifcsname\??linefillerindex\currentlinefiller\endcsname
+        \lastnamedcs\zerocount
+    \else
+        \expandafter\newcount\csname\??linefillerindex\currentlinefiller\endcsname
+    \fi
+    \etoksapp\t_node_linefiller_checklist{\t_node_linefiller_checklist\node_linefiller_redefine{\currentlinefiller}}%
+    \node_linefiller_define
+\to \everydefinelinefiller
+
+\protected\def\node_linefiller_define
+  {\edef\p_node_rules_color{\linefillerparameter\c!color}%
+   \setevalue{\??linefillerattribute\currentlinefiller}{\number
+   \clf_definelinefiller
+    %method         \linefillerparameter\c!method
+     location      {\linefillerparameter\c!location}%
+     scope         {\linefillerparameter\c!scope}%
+     mp            {\includeMPgraphic{\linefillerparameter\c!mp}}%
+     ma             \thecolormodelattribute
+     ca             \thecolorattribute\p_node_rules_color
+     ta             \thetransparencyattribute\p_node_rules_color
+     height         \dimexpr\linefillerparameter\c!height\relax
+     depth          \dimexpr\linefillerparameter\c!depth\relax
+     distance       \dimexpr\linefillerparameter\c!distance\relax
+     threshold      \dimexpr\linefillerparameter\c!threshold\relax
+     rulethickness  \dimexpr\linefillerparameter\c!rulethickness\relax
+   \relax}}
+
+\protected\def\node_linefiller_redefine#1%
+  {\def\currentlinefiller{#1}\node_linefiller_define}
+
+\protected\def\node_linefiller_set#1% todo: check parent ! todo: move attr etc to lua
+  {\def\currentlinefiller{#1}%
+   \expandafter\let\expandafter\c_node_linefiller_index\csname\??linefillerindex#1\endcsname
+   \advance\c_node_linefiller_index\plusone
+   \clf_enablelinefillers
+   \c_attr_linefiller\numexpr
+      \plusthousand*\c_node_linefiller_index
+     +\csname\??linefillerattribute#1\ifcsname\??linefiller#1:\number\c_node_linefiller_index\s!parent\endcsname:\number\c_node_linefiller_index\fi\endcsname
+   \relax}
+
+\permanent\tolerant\protected\def\startlinefiller[#1]#*[#2]%
+  {\begingroup
+   \par
+   \def\currentlinefiller{#1}%
+   \ifargument#1\or
+     % we need to update settings
+     \setuplinefiller[#1][#2]% no \setupcurrentlinefiller as we need to update settings
+   \fi
+   \node_linefiller_set{#1}%
+   \linefillerparameter\c!before
+   \usealignparameter\linefillerparameter
+   \uselinefillerstyleandcolor\c!textstyle\c!textcolor} % bars have foregroundcolor
+
+\permanent\protected\def\stoplinefiller
+  {\par
+   \linefillerparameter\c!after
+   \endgroup}
+
+\permanent\protected\def\setlinefiller[#1]%
+  {\node_linefiller_set{#1}}
+
+\setuplinefillers
+  [%c!method=0,
+   %c!mp=,
+   \c!location=\v!both,
+   \c!scope=\v!local,
+   \c!distance=\zeropoint,
+   \c!threshold=\zeropoint,
+   \c!rulethickness=\linewidth,
+   \c!height=\linewidth,
+   \c!depth=\zeropoint,
+  %\c!textcolor=,
+  %\c!textstyle=,
+  %\c!align=,
+  %\c!before=,
+  %\c!after=,
+   \c!color=]
+
+\definelinefiller
+  [filler]
+  [\c!height=.75\exheight,
+  %\c!mp=rules:filler:demo,
+  %\c!threshold=.25\emwidth,
+   \c!distance=.25\emwidth,
+   \c!rulethickness=.25\exheight]
+
+%D Bonus:
+%D
+%D \starttyping
+%D \startuseMPgraphic{foo}
+%D     fill unitsquare
+%D         xyscaled (RuleWidth,RuleHeight+RuleDepth) enlarged (ExHeight/4,ExHeight/8)
+%D         shifted  (-ExHeight/8,ExHeight/16)
+%D         withcolor RuleColor ;
+%D \stopuseMPgraphic
+%D
+%D \definelinefiller[foo][mp=foo,color=darkred]
+%D
+%D \linefillerhbox[foo]{OEPS}
+%D \stoptyping
+
+\protected\def\node_backgrounds_filler_box#1#2[#3]%
+  {\bgroup
+   \clf_enablebackgroundboxes
+   \dowithnextbox{%
+     \node_linefiller_set{#3}% already sets the attribute
+     #1%
+        attr \backgroundattribute \plusone
+      % attr \linefillerattribute \the\c_attr_linefiller
+       {\box\nextbox}%
+     \egroup}%
+   #2}
+
+\permanent\protected\def\linefillerhbox{\node_backgrounds_filler_box\hpack\hbox}
+\permanent\protected\def\linefillervbox{\node_backgrounds_filler_box\vpack\vbox}
+\permanent\protected\def\linefillervtop{\node_backgrounds_filler_box\tpack\vtop}
+
+%D Bonus:
+
+\permanent\protected\def\autorule{\clf_autorule} % todo: public implementor
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/scrn-bar.mkvi b/tex/context/base/mkiv/scrn-bar.mkvi
index c089eb945..4b50a437d 100644
--- a/tex/context/base/mkiv/scrn-bar.mkvi
+++ b/tex/context/base/mkiv/scrn-bar.mkvi
@@ -343,13 +343,13 @@
        \ifnum\scratchcounterthree<\plusone \scratchcounterthree\plusone \fi
        \scratchcounterfive\zerocount
        \dostepwiserecurse\firstsubpage\lastsubpage\plusone
-         {\!!doneafalse
+         {\donefalse
           \advance\scratchcounterfive \plusone
-          \ifnum\recurselevel=\firstsubpage\relax \!!doneatrue \fi
-          \ifnum\recurselevel=\lastsubpage \relax \!!doneatrue \fi
+          \ifnum\recurselevel=\firstsubpage\relax \donetrue \fi
+          \ifnum\recurselevel=\lastsubpage \relax \donetrue \fi
           \scratchcountersix\therealsubpageno\recurselevel\relax
           \c_scrn_bar_mode
-            \if!!donea
+            \ifdone
               \ifnum\scratchcountersix<\realpageno
                 \zerocount
               \else\ifnum\scratchcountersix>\realpageno
diff --git a/tex/context/base/mkiv/scrp-ini.mkiv b/tex/context/base/mkiv/scrp-ini.mkiv
index dccea2ee0..ab934fe3b 100644
--- a/tex/context/base/mkiv/scrp-ini.mkiv
+++ b/tex/context/base/mkiv/scrp-ini.mkiv
@@ -59,9 +59,9 @@
 
 % presets are global and are currently defined in lua
 
-\appendtoks
-    \setuevalue\currentscript{\setscript[\currentscript]}%
-\to \everydefinescript
+% \appendtoks
+%     \setuevalue\currentscript{\setscript[\currentscript]}%
+% \to \everydefinescript
 
 \unexpanded\def\scripts_basics_set
   {\clf_setscript{\currentscript}{\scriptparameter\c!method}{\scriptparameter\c!preset}}
@@ -96,7 +96,7 @@
 % \def\scripts_basics_set_splitter_list[#1][#2]%
 %   {\ctxcommand{setscriptsplitterlist("#1","#2")}
 
-% \setscript[hangul] \hangul \startscript[hangul]
+% \setscript[hangul] \startscript[hangul]
 
 \definescript [hangul]   [\c!method=hangul]
 \definescript [hanzi]    [\c!method=hanzi]
diff --git a/tex/context/base/mkiv/spac-ali.mkxl b/tex/context/base/mkiv/spac-ali.mkxl
index bc43db8ff..5cb494682 100644
--- a/tex/context/base/mkiv/spac-ali.mkxl
+++ b/tex/context/base/mkiv/spac-ali.mkxl
@@ -21,12 +21,6 @@
 
 \registerctxluafile{spac-ali}{optimize}
 
-\immutable\chardef\normalizelinemodecode  = "01
-\immutable\chardef\indentskipmodecode     = "02
-\immutable\chardef\swaphangindentmodecode = "04
-\immutable\chardef\swapparskipmodecode    = "08
-\immutable\chardef\breakafterdirmodecode  = "10
-
 \definesystemattribute[realign]   [public] % might be combined with the next one
 \definesystemattribute[alignstate][public] % will make a single attributes for several states
 
@@ -508,7 +502,7 @@
   {\bottomraggednessmode\plustwo
    \settopskip}
 
-\let\normalbottom\alignbottom % downward compatible
+\aliased\let\normalbottom\alignbottom % downward compatible
 
 \permanent\protected\def\setbottomalignmode#1%
   {\bottomraggednessmode#1%
@@ -1241,4 +1235,9 @@
 
 \permanent\def\usedirectionparameterreverse#1{\begincsname\??reverse#1\c!direction\endcsname}
 
+%D Now official:
+
+\permanent\protected\def\spaceorpar
+  {\endgraf\ifhmode\space\fi}
+
 \protect \endinput
diff --git a/tex/context/base/mkiv/spac-hor.mkxl b/tex/context/base/mkiv/spac-hor.mkxl
index 450e4fd76..b6f92947e 100644
--- a/tex/context/base/mkiv/spac-hor.mkxl
+++ b/tex/context/base/mkiv/spac-hor.mkxl
@@ -19,6 +19,9 @@
 
 \let\parfillrightskip\parfillskip
 
+\bitwiseflip \normalizelinemode \parindentskipcode
+\bitwiseflip \normalizelinemode \normalizelinecode
+
 \let\v_spac_indentation_current\empty % amount/keyword
 
 \newdimen \d_spac_indentation_par
diff --git a/tex/context/base/mkiv/spac-ver.lmt b/tex/context/base/mkiv/spac-ver.lmt
index 2cda39586..90eeacf26 100644
--- a/tex/context/base/mkiv/spac-ver.lmt
+++ b/tex/context/base/mkiv/spac-ver.lmt
@@ -765,301 +765,196 @@ do
         end
     end
 
-    do -- old variant
-
-        local ctx_fixedblankskip         = context.fixedblankskip
-        local ctx_flexibleblankskip      = context.flexibleblankskip
-        local ctx_setblankcategory       = context.setblankcategory
-        local ctx_setblankorder          = context.setblankorder
-        local ctx_setblankpenalty        = context.setblankpenalty
-        ----- ctx_setblankhandling       = context.setblankhandling
-        local ctx_flushblankhandling     = context.flushblankhandling
-        local ctx_addpredefinedblankskip = context.addpredefinedblankskip
-        local ctx_addaskedblankskip      = context.addaskedblankskip
-        local ctx_setblankpacked         = context.setblankpacked
-
-        local ctx_pushlogger             = context.pushlogger
-        local ctx_startblankhandling     = context.startblankhandling
-        local ctx_stopblankhandling      = context.stopblankhandling
-        local ctx_poplogger              = context.poplogger
-
-        local pattern = nil
-
-        local packed  = categories.packed
-
-        local function handler(amount, keyword, detail)
-            if not keyword then
-                report_vspacing("unknown directive %a",s)
-            else
-                local mk = map[keyword]
-                if mk then
-                    lpegmatch(pattern,mk)
-                elseif keyword == k_fixed then
-                    ctx_fixedblankskip()
-                elseif keyword == k_flexible then
-                    ctx_flexibleblankskip()
-                elseif keyword == k_category then
-                    local category = tonumber(detail)
-                    if category == packed then
-                        ctx_setblankpacked()
-                    elseif category then
-                        ctx_setblankcategory(category)
-                        ctx_flushblankhandling()
-                    end
-                elseif keyword == k_order and detail then
-                    local order = tonumber(detail)
-                    if order then
-                        ctx_setblankorder(order)
-                    end
-                elseif keyword == k_penalty and detail then
-                    local penalty = tonumber(detail)
-                    if penalty then
-                        ctx_setblankpenalty(penalty)
-                    end
-                else
-                    amount = tonumber(amount) or 1
-                    local sk = skip[keyword]
-                    if sk then
-                        ctx_addpredefinedblankskip(amount,keyword)
-                    else -- no check
-                        ctx_addaskedblankskip(amount,keyword)
-                    end
-                end
-            end
-        end
-
-        local splitter = ((multiplier + singlefier) * keyword * (category + Cc(false))) / handler
-              pattern  = (splitter + separator^1)^0
-
-        function vspacing.analyze(str)
-            if trace_vspacing then
-                ctx_pushlogger(report_vspacing)
-                ctx_startblankhandling()
-                lpegmatch(pattern,str)
-                ctx_stopblankhandling()
-                ctx_poplogger()
-            else
-                ctx_startblankhandling()
-                lpegmatch(pattern,str)
-                ctx_stopblankhandling()
-            end
-        end
-
+    local expandmacro = token.expand_macro
+ -- local runlocal    = tex.runlocal
+ -- local setmacro    = tokens.setters.macro
+ -- local settoks     = tex.settoks
+    local toscaled    = tex.toscaled
+
+    local setattrs    = nuts.setattrs
+
+    local b_done     = false
+    local b_packed   = false
+
+    local b_amount   = 0
+    local b_stretch  = 0
+    local b_shrink   = 0
+    local b_category = false
+    local b_penalty  = false
+    local b_order    = false
+    local b_fixed    = false
+    local b_grid     = false
+
+    local pattern    = nil
+
+    local packed     = categories.packed
+
+    local gluefactor = .25
+
+    local ctx_ignoreparskip = context.core.ignoreparskip
+
+    local function before()
+        b_amount   = 0
+        b_stretch  = 0
+        b_shrink   = 0
+        b_category = 1
+        b_penalty  = false
+        b_order    = false
+        b_fixed    = b_grid
     end
 
-    do -- new variant
-
-        local expandmacro = token.expand_macro
-     -- local runlocal    = tex.runlocal
-     -- local setmacro    = tokens.setters.macro
-     -- local settoks     = tex.settoks
-        local toscaled    = tex.toscaled
-
-        local setattrs    = nuts.setattrs
-
-        local b_done     = false
-        local b_packed   = false
-
-        local b_amount   = 0
-        local b_stretch  = 0
-        local b_shrink   = 0
-        local b_category = false
-        local b_penalty  = false
-        local b_order    = false
-        local b_fixed    = false
-        local b_grid     = false
-
-        local pattern    = nil
-
-        local packed     = categories.packed
-
-        local gluefactor = .25
-
-        local ctx_ignoreparskip           = context.core.ignoreparskip
-
-     -- local ctx_vspacingfromtempstring  = context.core.vspacingfromtempstring
-     -- local ctx_vspacingfromscratchtoks = context.core.vspacingfromscratchtoks
-
-     -- local ctx_vspacingpredefinedvalue = context.core.vspacingpredefinedvalue
-     --
-     -- local cache = table.setmetatableindex(function(t,k)
-     --     local v = function() ctx_vspacingpredefinedvalue(k) end
-     --     t[k] = v
-     --     return v
-     -- end)
-
-        local function before()
-            b_amount   = 0
-            b_stretch  = 0
-            b_shrink   = 0
-            b_category = 1
-            b_penalty  = false
-            b_order    = false
-            b_fixed    = b_grid
-        end
-
-        local function after()
-            if fixed then
-                b_stretch = 0
-                b_shrink  = 0
-            else
-                b_stretch = gluefactor * b_amount
-                b_shrink  = gluefactor * b_amount
-            end
+    local function after()
+        if fixed then
+            b_stretch = 0
+            b_shrink  = 0
+        else
+            b_stretch = gluefactor * b_amount
+            b_shrink  = gluefactor * b_amount
         end
+    end
 
-        -- use a cache for predefined ones
-
-     -- local function inject()
-     --     local n = new_glue(b_amount,b_stretch,b_shrink)
-     --     if b_category then
-     --         setattr(n,a_skipcategory,b_category)
-     --     end
-     --     if b_penalty then
-     --         setattr(n,a_skippenalty,b_penalty)
-     --     end
-     --     if b_order then
-     --         setattr(n,a_skiporder,b_order or 1)
-     --     end
-     --     write_node(n)
-     -- end
+    -- use a cache for predefined ones
 
-        local function inject()
-            local n = new_glue(b_amount,b_stretch,b_shrink)
-            setattrs(n,false,a_skipcategory,b_category,a_skippenalty,b_penalty,a_skiporder,b_order or 1)
-            write_node(n)
-        end
+    local function inject()
+        local n = new_glue(b_amount,b_stretch,b_shrink)
+        setattrs(n,false,a_skipcategory,b_category,a_skippenalty,b_penalty,a_skiporder,b_order or 1)
+        write_node(n)
+    end
 
-        local function flush()
-            after()
-            if b_done then
-                inject()
-                b_done = false
-            end
-            before()
+    local function flush()
+        after()
+        if b_done then
+            inject()
+            b_done = false
         end
+        before()
+    end
 
-    --  local cmd = token.create("vspacingfromtempstring")
-        local cmd = token.create("vspacingpredefinedvalue")
+ -- local cmd = token.create("vspacingfromtempstring")
+ -- local cmd = token.create("vspacingpredefinedvalue") -- not yet known
 
-        local function handler(multiplier, keyword, detail)
-            if not keyword then
-                report_vspacing("unknown directive %a",s)
+    local function handler(multiplier, keyword, detail)
+        if not keyword then
+            report_vspacing("unknown directive %a",s)
+        else
+            local mk = map[keyword]
+            if mk then
+                lpegmatch(pattern,mk)
+            elseif keyword == k_fixed then
+                b_fixed = true
+            elseif keyword == k_flexible then
+                b_flexible = false
+            elseif keyword == k_category then
+                local category = tonumber(detail)
+                if category == packed then
+                    b_packed = true
+                elseif category then
+                    b_category = category
+                    b_done     = true
+                    flush()
+                end
+            elseif keyword == k_order and detail then
+                local order = tonumber(detail)
+                if order then
+                    b_order = order
+                end
+            elseif keyword == k_penalty and detail then
+                local penalty = tonumber(detail)
+                if penalty then
+                    flush()
+                    b_done = true
+                    b_category = 3
+                    b_penalty = penalty
+                    flush()
+                end
             else
-                local mk = map[keyword]
-                if mk then
-                    lpegmatch(pattern,mk)
-                elseif keyword == k_fixed then
-                    b_fixed = true
-                elseif keyword == k_flexible then
-                    b_flexible = false
-                elseif keyword == k_category then
-                    local category = tonumber(detail)
-                    if category == packed then
-                        b_packed = true
-                    elseif category then
-                        b_category = category
-                        b_done     = true
-                        flush()
-                    end
-                elseif keyword == k_order and detail then
-                    local order = tonumber(detail)
-                    if order then
-                        b_order = order
+                local amount, stretch, shrink
+                multiplier = tonumber(multiplier) or 1
+                local sk = skip[keyword]
+                if sk then
+                    -- multiplier, keyword
+                    -- best, for now, todo: runlocal with arguments
+                    expandmacro("vspacingpredefinedvalue",true,keyword)
+                 -- expandmacro(cmd,true,keyword)
+                 -- setmacro("tempstring",keyword)
+                 -- runlocal(cmd)
+                    -- nicest
+                 -- runlocal(cache[keyword])
+                    -- fast
+                 -- settoks("scratchtoks",keyword)
+                 -- runlocal("vspacingfromscratchtoks")
+                    -- middleground
+                 -- setmacro("tempstring",keyword)
+                 -- runlocal(ctx_vspacingfromtempstring)
+                    --
+                    amount, stretch, shrink = texgetglue("scratchskip")
+                    if not stretch then
+                        stretch = 0
                     end
-                elseif keyword == k_penalty and detail then
-                    local penalty = tonumber(detail)
-                    if penalty then
-                        flush()
-                        b_done = true
-                        b_category = 3
-                        b_penalty = penalty
-                        flush()
+                    if not shrink then
+                        shrink = 0
                     end
-                else
-                    local amount, stretch, shrink
-                    multiplier = tonumber(multiplier) or 1
-                    local sk = skip[keyword]
-                    if sk then
-                        -- multiplier, keyword
-                        -- best, for now, todo: runlocal with arguments
-                     -- expandmacro("vspacingpredefinedvalue",true,keyword)
-                        expandmacro(cmd,true,keyword)
-                     -- setmacro("tempstring",keyword)
-                     -- runlocal(cmd)
-                        -- nicest
-                     -- runlocal(cache[keyword])
-                        -- fast
-                     -- settoks("scratchtoks",keyword)
-                     -- runlocal("vspacingfromscratchtoks")
-                        -- middleground
-                     -- setmacro("tempstring",keyword)
-                     -- runlocal(ctx_vspacingfromtempstring)
-                        --
-                        amount, stretch, shrink = texgetglue("scratchskip")
-                        if stretch == 0 and shrink == 0 then
-                            stretch = gluefactor * amount -- always unless grid
-                            shrink  = stretch             -- always unless grid
-                        end
-                    else -- no check, todo: parse plus and minus
-                        amount  = toscaled(keyword)
+                    if stretch == 0 and shrink == 0 then
                         stretch = gluefactor * amount -- always unless grid
                         shrink  = stretch             -- always unless grid
                     end
-                    -- we look at fixed later
-                    b_amount  = b_amount  + multiplier * amount
-                    b_stretch = b_stretch + multiplier * stretch
-                    b_shrink  = b_shrink  + multiplier * shrink
-                    b_done    = true
+                else -- no check, todo: parse plus and minus
+                    amount  = toscaled(keyword)
+                    stretch = gluefactor * amount -- always unless grid
+                    shrink  = stretch             -- always unless grid
                 end
+                -- we look at fixed later
+                b_amount  = b_amount  + multiplier * amount
+                b_stretch = b_stretch + multiplier * stretch
+                b_shrink  = b_shrink  + multiplier * shrink
+                b_done    = true
             end
         end
+    end
 
-        -- alternatively we can make a table and have a keyword -> split cache but this is probably
-        -- not really a bottleneck
+    -- alternatively we can make a table and have a keyword -> split cache but this is probably
+    -- not really a bottleneck
 
-        local splitter = ((multiplier + singlefier) * keyword * (category + Cc(false))) / handler
-              pattern  = (splitter + separator^1)^0
+    local splitter = ((multiplier + singlefier) * keyword * (category + Cc(false))) / handler
+          pattern  = (splitter + separator^1)^0
 
-        function vspacing.inject(grid,str)
-            if trace_vspacing then
-             -- ctx_pushlogger(report_vspacing)
-            end
-            b_done   = false
-            b_packed = false
-            b_grid   = gridsnapping
-            before()
-            lpegmatch(pattern,str)
-            after()
-            if b_done then
-                inject()
-            end
-            if b_packed then
-                ctx_ignoreparskip()
-            end
-            if trace_vspacing then
-             -- ctx_poplogger()
-            end
+    function vspacing.inject(grid,str)
+        if trace_vspacing then
+         -- ctx_pushlogger(report_vspacing)
         end
-
-        function vspacing.injectpenalty(penalty)
-            local n = new_glue()
-            setattrs(n,false,a_skipcategory,categories.penalty,a_skippenalty,penalty,a_skiporder,1)
-            write_node(n)
+        b_done   = false
+        b_packed = false
+        b_grid   = gridsnapping
+        before()
+        lpegmatch(pattern,str)
+        after()
+        if b_done then
+            inject()
         end
-
-        function vspacing.injectskip(amount)
-            local n = new_glue(amount)
-            setattrs(n,false,a_skipcategory,categories.largest,a_skippenalty,false,a_skiporder,1)
-            write_node(n)
+        if b_packed then
+            ctx_ignoreparskip()
         end
-
-        function vspacing.injectdisable(amount)
-            local n = new_glue()
-            setattrs(n,false,a_skipcategory,categories.disable,a_skippenalty,false,a_skiporder,1)
-            write_node(n)
+        if trace_vspacing then
+         -- ctx_poplogger()
         end
+    end
+
+    function vspacing.injectpenalty(penalty)
+        local n = new_glue()
+        setattrs(n,false,a_skipcategory,categories.penalty,a_skippenalty,penalty,a_skiporder,1)
+        write_node(n)
+    end
+
+    function vspacing.injectskip(amount)
+        local n = new_glue(amount)
+        setattrs(n,false,a_skipcategory,categories.largest,a_skippenalty,false,a_skiporder,1)
+        write_node(n)
+    end
 
+    function vspacing.injectdisable(amount)
+        local n = new_glue()
+        setattrs(n,false,a_skipcategory,categories.disable,a_skippenalty,false,a_skiporder,1)
+        write_node(n)
     end
 
 end
@@ -2466,12 +2361,12 @@ do
 
     -- old variant
 
-    implement {
-        name      = "vspacing",
-        actions   = vspacing.analyze,
-        scope     = "private",
-        arguments = "string"
-    }
+--     implement {
+--         name      = "vspacing",
+--         actions   = vspacing.analyze,
+--         scope     = "private",
+--         arguments = "string"
+--     }
 
     -- new variant
 
diff --git a/tex/context/base/mkiv/spac-ver.mkxl b/tex/context/base/mkiv/spac-ver.mkxl
index 3cc8dbcad..92adce2c6 100644
--- a/tex/context/base/mkiv/spac-ver.mkxl
+++ b/tex/context/base/mkiv/spac-ver.mkxl
@@ -1931,6 +1931,10 @@
 \def\spac_vspacing_no_topskip % use grouped
   {\c_attr_skipcategory\pluseleven}
 
+%permanent\def\vspacingfromscratchtoks  {\scratchdimen\dimexpr\csname\??vspacingamount\the\scratchtoks\endcsname\relax}
+\permanent\def\vspacingpredefinedvalue#1{\scratchskip\glueexpr\csname\??vspacingamount#1\endcsname\relax}
+%permanent\def\vspacingfromtempstring   {\scratchdimen\dimexpr\csname\??vspacingamount\tempstring\endcsname\relax}
+
 % \installcorenamespace{vspacingamountnormal}
 % \installcorenamespace{vspacingamountgrid}
 
@@ -1976,81 +1980,6 @@
     \relax
 \to \everyafterblankhandling
 
-\permanent\protected\def\setblankpacked
-  {\settrue\c_space_ignore_parskip}
-
-\permanent\protected\def\setblankcategory#1%
-  {\settrue\c_space_vspacing_done
-   \c_attr_skipcategory#1\relax}
-
-\permanent\protected\def\setblankorder#1%
-  {\c_attr_skiporder#1\relax}
-
-\permanent\protected\def\fixedblankskip
-  {\settrue\c_space_vspacing_fixed}
-
-\permanent\protected\def\flexibleblankskip
-  {\setfalse\c_space_vspacing_fixed}
-
-% \protected\def\addblankskip#1#2#3%
-%   {\settrue\c_space_vspacing_done
-%    \advance\s_spac_vspacing_temp#1\dimexpr\ifgridsnapping#3\else#2\fi\relax\relax}
-
-\permanent\protected\def\setblankpenalty#1%
-  {\flushblankhandling
-   \settrue\c_space_vspacing_done
-   \c_attr_skipcategory\plusthree
-   \c_attr_skippenalty #1\relax
-   \flushblankhandling}
-
-\permanent\protected\def\startblankhandling % move this to \vspacing
-  {\par
-   \ifvmode
-     \expandafter\dostartblankhandling
-   \else
-     \expandafter\nostartblankhandling
-   \fi}
-
-\permanent\protected\def\nostartblankhandling#1\stopblankhandling
-  {}
-
-\permanent\def\dostartblankhandling
-  {\begingroup
-   \setfalse\c_space_vspacing_done
-   \setfalse\c_space_ignore_parskip
-   \the\everybeforeblankhandling}
-
-\permanent\protected\def\stopblankhandling
-  {\the\everyafterblankhandling
-   \ifconditional\c_space_vspacing_done
-     \vskip\s_spac_vspacing_temp
-   \fi
-   \ifconditional\c_space_ignore_parskip
-     \endgroup\ignoreparskip
-   \else
-     \endgroup
-   \fi}
-
-\permanent\protected\def\flushblankhandling
-  {\the\everyafterblankhandling
-   \ifconditional\c_space_vspacing_done
-     \vskip\s_spac_vspacing_temp
-     \setfalse\c_space_vspacing_done
-   \fi
-   \the\everybeforeblankhandling}
-
-\permanent\protected\def\addpredefinedblankskip#1#2%
-  {\settrue\c_space_vspacing_done
-   \advance\s_spac_vspacing_temp#1\dimexpr\csname\??vspacingamount#2\endcsname\relax}
-
-% \protected\def\addpredefinedblankskip#1#2%
-%   {\settrue\c_space_vspacing_done
-%    \advance\s_spac_vspacing_temp#1\dimexpr\the\csname\ifgridsnapping g\else n\fi>#2\endcsname\relax}
-
-\permanent\protected\def\addaskedblankskip#1#2%
-  {\settrue\c_space_vspacing_done
-   \advance\s_spac_vspacing_temp#1\dimexpr#2\relax}
-
 % The main spacer:
 
 % \protected\def\vspacing
@@ -2081,29 +2010,16 @@
      \expandafter\spac_vspacing_nop_ignore
    \fi}
 
-\def\spac_vspacing_yes_indeed[#1]%
-  {\ifmmode\else\par\clf_vspacing{#1}\fi}
+\def\spac_vspacing_yes_indeed[#1]{\ifmmode\else\par\ifvmode\clf_injectvspacing\ifgridsnapping\plusone\else\zerocount\fi{#1}\fi\fi}
+\def\spac_vspacing_nop_indeed    {\ifmmode\else\par\ifvmode\clf_injectvspacing\ifgridsnapping\plusone\else\zerocount\fi{\currentvspacing}\fi\fi}
 
-\def\spac_vspacing_yes_ignore[#1]%
-  {\ifmmode\else\par\fi}
-
-\def\spac_vspacing_nop_indeed
-  {\ifmmode\else\par\clf_vspacing{\currentvspacing}\fi}
-
-\def\spac_vspacing_nop_ignore
-  {\ifmmode\else\par\fi}
+\def\spac_vspacing_yes_ignore[#1]{\ifmmode\else\par\fi}
+\def\spac_vspacing_nop_ignore    {\ifmmode\else\par\fi}
 
 \installcorenamespace{vspacing}
 
-\protected\def\directvspacing#1%
-  {\par
-   \ifchkdim#1\or
-     \spac_vspacing_dim_preset{\the\dimexpr#1}%
-   \orelse\ifcsname\??vspacing#1\endcsname
-     \lastnamedcs
-   \else
-     \spac_vspacing_yes_preset{#1}%
-   \fi}
+\permanent\protected\def\directvspacing#1%
+ {\ifmmode\else\par\ifvmode\clf_injectvspacing\ifgridsnapping\plusone\else\zerocount\fi{\iftok{#1}\emptytoks\currentvspacing\else#1\fi}\fi\fi}
 
 \def\spac_vspacing_dim_preset#1%
   {\ifcsname\??vspacing#1\endcsname
@@ -2119,16 +2035,6 @@
   %\writestatus{}{}%
    \csname\??vspacing#1\endcsname}
 
-\def\spac_vspacing_yes_indeed[#1]%
-  {\ifmmode\else
-     \directvspacing{#1}%
-   \fi}
-
-\def\spac_vspacing_nop_indeed
-  {\ifmmode\else
-     \directvspacing\currentvspacing
-   \fi}
-
 \permanent\protected\def\directdefaultvspacing
   {\ifinpagebody % somewhat weird
      \directvspacing\currentvspacing
@@ -2153,21 +2059,8 @@
 
 %D Handy (and faster):
 
-\permanent\protected\def\directvpenalty#1%
-  {\begingroup
-   \c_attr_skipcategory\plusthree
-   \c_attr_skippenalty #1\relax
-   \c_attr_skiporder   \attributeunsetvalue
-   \vskip\zeropoint
-   \endgroup}
-
-\permanent\protected\def\directvskip#1%
-  {\begingroup
-   \c_attr_skipcategory\plusone
-   \c_attr_skippenalty \attributeunsetvalue
-   \c_attr_skiporder   \attributeunsetvalue
-   \vskip#1\relax
-   \endgroup}
+\permanent\protected\def\directvpenalty#1{\ifmmode\else\par\ifvmode\clf_injectvpenalty#1\relax\fi\fi}
+\permanent\protected\def\directvskip   #1{\ifmmode\else\par\ifvmode\clf_injectvskip   #1\relax\fi\fi}
 
 %D These depend on bigskipamount cum suis so we'd better sync them:
 
@@ -2310,13 +2203,7 @@
 %
 % but use the following more efficient variant instead:
 
-\permanent\protected\def\inhibitblank
-  {\ifvmode
-     \begingroup
-     \c_attr_skipcategory\plusfive
-     \vskip\zeropoint
-     \endgroup
-   \fi}
+\permanent\protected\def\inhibitblank{\ifmmode\else\par\ifvmode\clf_injectdisable\fi\fi}
 
 \let\doinhibitblank\inhibitblank % keep this command, used in styles
 
@@ -2578,57 +2465,4 @@
 
 \protected\def\ignoreparskip{\c_spac_vspacing_ignore_parskip\plusone}
 
-% experimental (for the moment only for hh and ws)
-
-%def\vspacingfromscratchtoks  {\scratchdimen\dimexpr\csname\??vspacingamount\the\scratchtoks\endcsname\relax}
-\def\vspacingpredefinedvalue#1{\scratchskip\glueexpr\csname\??vspacingamount#1\endcsname\relax}
-%def\vspacingfromtempstring   {\scratchdimen\dimexpr\csname\??vspacingamount\tempstring\endcsname\relax}
-
-\let\spac_vspacing_yes_indeed_old\spac_vspacing_yes_indeed
-\let\spac_vspacing_nop_indeed_old\spac_vspacing_nop_indeed
-\let\directvspacing_old          \directvspacing
-
-\def\spac_vspacing_yes_indeed_new[#1]%
-  {\ifmmode\else\par\ifvmode\clf_injectvspacing\ifgridsnapping\plusone\else\zerocount\fi{#1}\fi\fi}
-
-\def\spac_vspacing_nop_indeed_new
-  {\ifmmode\else\par\ifvmode\clf_injectvspacing\ifgridsnapping\plusone\else\zerocount\fi{\currentvspacing}\fi\fi}
-
-\protected\def\directvspacing_new#1%
-%{\ifmmode\else\par\ifvmode\clf_injectvspacing\ifgridsnapping\plusone\else\zerocount\fi{#1}\fi\fi}
- {\ifmmode\else\par\ifvmode\clf_injectvspacing\ifgridsnapping\plusone\else\zerocount\fi{\iftok{#1}\emptytoks\currentvspacing\else#1\fi}\fi\fi}
-
-\let\directvpenalty_old\directvpenalty
-\let\directvskip_old   \directvskip
-\let\inhibitblank_old  \inhibitblank
-
-\protected\def\directvpenalty_new#1{\ifmmode\else\par\ifvmode\clf_injectvpenalty#1\relax\fi\fi}
-\protected\def\directvskip_new   #1{\ifmmode\else\par\ifvmode\clf_injectvskip   #1\relax\fi\fi}
-\protected\def\inhibitblank_new    {\ifmmode\else\par\ifvmode\clf_injectdisable         \fi\fi}
-
-% we need to ensure \enforced
-
-\def\spac_vspacing_temp_yes
-  {\writestatus{vspacing}{enabling experimental handler}%
-   \enforced\let\spac_vspacing_yes_indeed\spac_vspacing_yes_indeed_new
-   \enforced\let\spac_vspacing_nop_indeed\spac_vspacing_nop_indeed_new
-   \enforced\let\directvspacing\directvspacing_new
-   \enforced\let\directvpenalty\directvpenalty_new
-   \enforced\let\directvskip\directvskip_new
-   \enforced\let\inhibitblank\inhibitblank_new}
-
-\def\spac_vspacing_temp_nop
-  {\writestatus{vspacing}{disabling experimental handler}%
-   \enforced\let\spac_vspacing_yes_indeed\spac_vspacing_yes_indeed_old
-   \enforced\let\spac_vspacing_nop_indeed\spac_vspacing_nop_indeed_old
-   \enforced\let\directvspacing\directvspacing_old
-   \enforced\let\directvpenalty\directvpenalty_old
-   \enforced\let\directvskip\directvskip_old
-   \enforced\let\inhibitblank\inhibitblank_old}
-
-\installtexdirective
-  {vspacing.experimental}
-  {\spac_vspacing_temp_yes}
-  {\spac_vspacing_temp_nop}
-
 \protect \endinput
diff --git a/tex/context/base/mkiv/status-files.pdf b/tex/context/base/mkiv/status-files.pdf
index 564a75c84..842543ac0 100644
--- a/tex/context/base/mkiv/status-files.pdf
+++ b/tex/context/base/mkiv/status-files.pdf
diff --git a/tex/context/base/mkiv/status-lua.pdf b/tex/context/base/mkiv/status-lua.pdf
index a65fd3799..30b41d6e6 100644
--- a/tex/context/base/mkiv/status-lua.pdf
+++ b/tex/context/base/mkiv/status-lua.pdf
diff --git a/tex/context/base/mkiv/strc-bkm.mkxl b/tex/context/base/mkiv/strc-bkm.mkxl
new file mode 100644
index 000000000..c5bd87324
--- /dev/null
+++ b/tex/context/base/mkiv/strc-bkm.mkxl
@@ -0,0 +1,182 @@
+%D \module
+%D   [       file=strc-bkm,
+%D        version=2009.04.01,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Bookmarks,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Structure Macros / Bookmarks}
+
+\registerctxluafile{strc-bkm}{}
+
+% \enabledirectives[references.bookmarks.preroll]
+
+\unprotect
+
+%D Bookmarks are a very viewer dependent feature. They are mostly used as additional
+%D table of contents and therefore relate directly to lists.
+%D
+%D A bookmark list is added to the document only when interaction is enabled. The
+%D given lists are bookmarked and a second argument specifies the opened bookmark
+%D trees.
+%D
+%D \starttyping
+%D \placebookmarks
+%D   [chapter,section,subsection,mylist]
+%D   [chapter]
+%D \stoptyping
+%D
+%D You can overloads the last set bookmark in a sectioning command:
+%D
+%D \starttyping
+%D \chapter {the first chapter}
+%D \bookmark {the first bookmark}
+%D \stoptyping
+%D
+%D However, in practice you can better use \type {\startchapter} and set the \type
+%D {bookmark} parameter.
+%D
+%D You can add entries to the bookmarklist:
+%D
+%D \starttyping
+%D \bookmark[mylist]{whatever}
+%D \stoptyping
+%D
+%D Use force to get titles in the bookmarklist. This is somewhat tricky as one does
+%D not want \quotation {Contents} in a table of contents but it has to be in the
+%D bookmark list.
+
+\installcorenamespace{bookmark}
+
+\installsetuponlycommandhandler \??bookmark {bookmark} % installdirectparametersethandler
+
+\setupbookmark
+  [\c!force=\v!no,        % it's easier to force that to inhibit
+   \c!number=\v!yes,      % might become v!no
+   \c!sectionblock=\v!no] % show sectionblock level + title
+
+\aliased\let\setupbookmarks\setupbookmark
+
+\permanent\protected\def\bookmark
+  {\iflocation
+     \expandafter\strc_bookmarks_bookmark_yes
+   \else
+     \expandafter\strc_bookmarks_bookmark_nop
+   \fi}
+
+\tolerant\def\strc_bookmarks_bookmark_yes[#1]#:#2%
+  {\begingroup
+   \simplifycommands
+   \ifnum\thenamedheadlevel{#1}>\zerocount
+     \clf_overloadbookmark{#1}{\detokenize\expandafter{\normalexpanded{#2}}}%
+   \else
+     \writetolist[#1]{#2}{}% todo: a dedicated bookmark writer
+   \fi
+   \endgroup}
+
+\tolerant\def\strc_bookmarks_bookmark_nop[#1]#:#2%
+  {}
+
+\permanent\protected\def\placebookmarks
+  {\iflocation
+     \expandafter\strc_bookmarks_place_yes
+   \else
+     \expandafter\gobblethreeoptionals
+   \fi}
+
+\let\m_bookmarks_names \empty
+\let\m_bookmarks_opened\empty
+
+\tolerant\def\strc_bookmarks_place_yes[#1]#*[#2]#*[#3]%
+  {\begingroup
+   \edef\m_bookmarks_names{#1}%
+   \edef\m_bookmarks_opened{#2}%
+   \ifempty\m_bookmarks_names
+     \edef\m_bookmarks_names{\namedlistparameter\v!content\c!list}%
+   \fi
+   \ifempty\m_bookmarks_names
+     \let\m_bookmarks_names\v!all
+   \fi
+   \ifparameters\or\or
+     \doifelseassignment{#2}{\let\m_bookmarks_opened\empty\setupcurrentbookmark[#2]}\donothing
+   \or
+     \setupcurrentbookmark[#3]% no every so not all possible
+   \fi
+   \clf_registerbookmark
+     names  {\m_bookmarks_names}%
+     opened {\m_bookmarks_opened}%
+     force  {\bookmarkparameter\c!force}%
+     number {\bookmarkparameter\c!number}%
+   \relax
+   \endgroup}
+
+\appendtoks
+    \clf_setupbookmarks
+      separatorset   {\bookmarkparameter\c!numberseparatorset}%
+      conversionset  {\bookmarkparameter\c!numberconversionset}%
+      starter        {\bookmarkparameter\c!numberstarter}%
+      stopper        {\bookmarkparameter\c!numberstopper}%
+      segments       {\bookmarkparameter\c!numbersegments}%
+      showblocktitle {\bookmarkparameter\c!sectionblock}%
+    \relax
+\to \everysetupbookmark
+
+%D There is a plugin mechanism but this is for experts only. The intermediate
+%D data structures are stable.
+%D
+%D \starttyping
+%D \startluacode
+%D     structures.bookmarks.installhandler("check before","before",function(levels)
+%D         logs.report("extra bookmarks","before (normal bookmarks)")
+%D         inspect(levels)
+%D         logs.report("extra bookmarks","before (extra bookmarks)")
+%D         inspect(structures.bookmarks.extras.get())
+%D         return levels
+%D     end)
+%D     structures.bookmarks.installhandler("check after", "after", function(levels)
+%D         logs.report("extra bookmarks","after (merged bookmarks)")
+%D         inspect(levels)
+%D         return levels
+%D     end)
+%D \stopluacode
+%D \starttyping
+%D
+%D This mechanism was added when bookmark inclusion became (optional) part of graphic
+%D inclusion (which is needed by Taco).
+%D
+%D \starttyping
+%D \getfiguredimensions[somefile.pdf]
+%D \dorecurse {\noffigurepages} {
+%D     \startTEXpage
+%D         \externalfigure[somefile.pdf][interaction=bookmark,page=\recurselevel]
+%D     \stopTEXpage
+%D }
+%D \starttyping
+
+\protect \endinput
+
+% \starttext
+% \setupinteraction[state=start]\setupinteractionscreen[option=bookmark]
+% \placebookmarks[chapter,section,subsection][chapter]
+% \chapter{First}
+% \bookmark{The First Indeed}
+% \section{alpha}
+% \bookmark[chapter]{The First Indeed Again}
+% \section{beta}
+% \chapter{Second}
+% \bookmark{The Second Indeed}
+% \section{gamma \tex{radiation}}
+% \subsection{a}
+% \subsection{b}
+% \section{delta}
+% \section{epsilon}
+% \chapter{Third \relax}
+% \chapter{我〈能吞下玻璃而不傷身〉體。} % whatever that means
+% \chapter{Idris Samawi Hamid ادريس سماوي حامد}
+% \stoptext
diff --git a/tex/context/base/mkiv/strc-con.mklx b/tex/context/base/mkiv/strc-con.mklx
index bdc18de81..08420a7ef 100644
--- a/tex/context/base/mkiv/strc-con.mklx
+++ b/tex/context/base/mkiv/strc-con.mklx
@@ -534,8 +534,8 @@
 \newbox   \constructionheadbox
 \newskip  \leftconstructionskip
 \newskip  \rightconstructionskip
-\newdimen \constructionsheadwidth    % replaces \!!widtha % TODO: proper namespace dimens
-\newdimen \constructionsheaddistance % replaces \!!widthb % TODO: proper namespace dimens
+\newdimen \constructionsheadwidth
+\newdimen \constructionsheaddistance
 
 \def\strc_constructions_set_hang_box#1% messy left/rightskip
   {\setbox\constructionheadbox\vtop   % \vbox gaat fout in hang
diff --git a/tex/context/base/mkiv/strc-flt.mklx b/tex/context/base/mkiv/strc-flt.mklx
index bbe027fd2..994ca288a 100644
--- a/tex/context/base/mkiv/strc-flt.mklx
+++ b/tex/context/base/mkiv/strc-flt.mklx
@@ -254,17 +254,17 @@
    \strc_floats_define_commands{#1}{#2}}
 
 \def\strc_floats_define_commands#1#2%
-  {\setuvalue         {\e!place\e!listof#2}{\dodoubleempty\strc_lists_place[#1]}% call will change
-   \setuvalue      {\e!complete\e!listof#2}{\dotripleempty\strc_lists_complete_indeed[#1][#2]}% call will change
-   \setuevalue                 {\e!place#1}{\strc_floats_place[#1]}%
-   \setuevalue         {\e!start\e!place#1}{\strc_floats_start_place[#1]}%
-   \setuevalue          {\e!stop\e!place#1}{\strc_floats_stop_place}%
-   \setuevalue          {\e!start#1\e!text}{\strc_floats_start_text[#1]}%
-   \setuevalue           {\e!stop#1\e!text}{\strc_floats_stop_text}%
+  {\frozen\instance\setuevalue{\e!place\e!listof#2}{\strc_lists_place[#1]}% call will change
+   \frozen\instance\setuevalue{\e!complete\e!listof#2}{\strc_lists_complete[#1][#2]}% call will change
+   \frozen\instance\setuevalue{\e!place#1}{\strc_floats_place[#1]}%
+   \frozen\instance\setuevalue{\e!start\e!place#1}{\strc_floats_start_place[#1]}%
+   \frozen\instance\setuevalue{\e!stop\e!place#1}{\strc_floats_stop_place}%
+   \frozen\instance\setuevalue{\e!start#1\e!text}{\strc_floats_start_text[#1]}%
+   \frozen\instance\setuevalue{\e!stop#1\e!text}{\strc_floats_stop_text}%
    % these will become obsolete:
-   \setuevalue               {\e!reserve#1}{\strc_floats_reserve[#1]}%
+   \setuevalue{\e!reserve#1}{\strc_floats_reserve[#1]}%
    \setuevalue{\e!start\e!reserve#1\e!text}{\strc_floats_start_reserve_text[#1]}%
-   \setuevalue {\e!stop\e!reserve#1\e!text}{\strc_floats_stop_reserve_text}}
+   \setuevalue{\e!stop\e!reserve#1\e!text}{\strc_floats_stop_reserve_text}}
 
 %D Fallback float body:
 
@@ -1256,24 +1256,24 @@
   {\begincsname\??floatmovement#setting\endcsname}
 
 \def\strc_floats_move_down_line#sign%
-  {\if!!donea \else
+  {\ifscratchconditionone \else
      \global\d_page_sides_downshift\zeropoint
-     \!!doneatrue
+     \scratchconditiononetrue
    \fi
    \global\advance\d_page_sides_downshift#sign\lineheight}
 
 \def\strc_floats_move_down_hang#lines%
-  {\if!!doneb \else
+  {\ifscratchconditiontwo \else
      \global\c_page_sides_n_of_lines\zerocount
-     \!!donebtrue
+     \scratchconditiontwotrue
    \fi
    \global\advance\c_page_sides_n_of_lines#lines\relax}
 
 \permanent\protected\def\movedownsidefloat[#settings]% already in core
   {\unless\ifhastok:{#settings}%
      \begingroup
-     \!!doneafalse
-     \!!donebfalse
+     \scratchconditiononefalse
+     \scratchconditiontwofalse
      \normalexpanded{\dorepeatwithcommand[#settings]}\strc_floats_move_down
      \endgroup
    \fi}
diff --git a/tex/context/base/mkiv/strc-ind.mkxl b/tex/context/base/mkiv/strc-ind.mkxl
new file mode 100644
index 000000000..31d7eb575
--- /dev/null
+++ b/tex/context/base/mkiv/strc-ind.mkxl
@@ -0,0 +1,128 @@
+%D \module
+%D   [       file=strc-ind, % was part of strc-des,
+%D        version=2008.10.20,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Indented Text,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Structure Macros / Indented Text}
+
+\unprotect
+
+%D \macros
+%D   {defineindentedtext,
+%D    setupindentedtext}
+%D
+%D Ok, we keep it but with a different command as it all looks too
+%D much like indentation and indenting. We also assume start/stop
+%D usage or some explicit par.
+
+\installcorenamespace{indentedtext}
+
+\installcommandhandler \??indentedtext {indentedtext} \??indentedtext
+
+%D \startbuffer
+%D \defineindentedtext[one][text=one]
+%D \defineindentedtext[two][text=two]
+%D
+%D \one test test \par
+%D \subone test test \par
+%D \subtwo test test \par
+%D \subsubone test test \par
+%D
+%D \startone
+%D     test test
+%D     \startone
+%D         test test
+%D         \startone
+%D             test test
+%D         \stopone
+%D         \starttwo
+%D             test test
+%D             \startone
+%D                 test test
+%D             \stopone
+%D         \stoptwo
+%D     \stopone
+%D \stopone
+%D \stopbuffer
+%D
+%D \typebuffer \getbuffer
+
+\newcount\c_strc_indentedtexts_nesting
+\newdimen\d_strc_indentedtexts_width
+\newdimen\d_strc_indentedtexts_distance
+
+\appendtoks
+   \frozen\instance\setuevalue    {\e!start\currentindentedtext}{\strc_indentedtexts_start{\currentindentedtext}\c_strc_indentedtexts_nesting}%
+   \frozen\instance\setuevalue    {\e!stop \currentindentedtext}{\strc_indentedtexts_stop}%
+   % to be avoided ... might go away
+   \frozen\instance\setuevalue            {\currentindentedtext}{\strc_indentedtexts_direct{\currentindentedtext}{0}}%
+   \frozen\instance\setuevalue      {\v!sub\currentindentedtext}{\strc_indentedtexts_direct{\currentindentedtext}{1}}%
+   \frozen\instance\setuevalue{\v!sub\v!sub\currentindentedtext}{\strc_indentedtexts_direct{\currentindentedtext}{2}}%
+\to \everydefineindentedtext
+
+\protected\def\strc_indentedtexts_start#1#2% we need to get rid of \spr
+  {\par
+   \begingroup
+   \edef\currentindentedtext{#1}%
+   \c_strc_indentedtexts_nesting#2\relax
+   \indentedtextparameter\c!before
+   \d_strc_indentedtexts_distance\indentedtextparameter\c!distance\relax
+   \doifnothing{\indentedtextparameter\c!sample}
+     {\setindentedtextparameter\c!sample{\indentedtextparameter\c!text}}%
+   \assignwidth
+     {\indentedtextparameter\c!width}
+     {\d_strc_indentedtexts_width}
+     {\useindentedtextstyleandcolor\c!headstyle\c!headcolor
+      \indentedtextparameter\c!sample
+      \spr{\indentedtextparameter\c!separator}}
+     {\d_strc_indentedtexts_distance}%
+   \advance\d_strc_indentedtexts_width \d_strc_indentedtexts_distance
+   \setbox\scratchbox\hbox to \d_strc_indentedtexts_width
+     {\useindentedtextstyleandcolor\c!headstyle\c!headcolor
+      \strut
+      \indentedtextparameter\c!text
+      \hss
+      \spr{\indentedtextparameter\c!separator}%
+      \hskip\d_strc_indentedtexts_distance}%
+   \parindent\zeropoint
+   \hskip\c_strc_indentedtexts_nesting\d_strc_indentedtexts_width
+   \advance\c_strc_indentedtexts_nesting\plusone
+   \dontleavehmode\box\scratchbox
+   \hangindent\c_strc_indentedtexts_nesting\d_strc_indentedtexts_width
+   \useindentedtextstyleandcolor\c!style\c!color}
+
+\protected\def\strc_indentedtexts_stop
+  {\indentedtextparameter\c!after
+   \par
+   \endgroup}
+
+\permanent\tolerant\protected\def\startindentedtext[#1]%
+  {\strc_indentedtexts_start{#1}\c_strc_indentedtexts_nesting}
+
+\permanent\let\stopindentedtext\strc_indentedtexts_stop
+
+\protected\def\strc_indentedtexts_direct#1#2#3\par % no longer clever grabpar trickery
+  {\strc_indentedtexts_start{#1}{#2}#3\strc_indentedtexts_stop}
+
+\setupindentedtext
+  [\c!style=\v!normal,
+   \c!headstyle=\v!normal,
+  %\c!color=,
+  %\c!headcolor=,
+   \c!width=\v!fit,
+   \c!text=\unknown,
+  %\c!sample=,
+   \c!before=\blank,
+   \c!after=\blank,
+   \c!distance=1em,
+   \c!separator={ :}]
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/strc-lnt.mklx b/tex/context/base/mkiv/strc-lnt.mklx
new file mode 100644
index 000000000..f24c93ee4
--- /dev/null
+++ b/tex/context/base/mkiv/strc-lnt.mklx
@@ -0,0 +1,359 @@
+%D \module
+%D   [       file=strc-lnt,
+%D        version=2002.05.10,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Line Notes,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+% todo: mkvi #
+
+\writestatus{loading}{ConTeXt Structure Macros / Line Notes}
+
+%D This module loads on top of the footnote and line numbering macros.
+
+\unprotect
+
+\installcorenamespace{linenote}
+
+\aliased\let\setuplinenote\setupnote
+
+\newcount\c_strc_linenotes
+\newtoks\everydefinelinenote
+
+\permanent\tolerant\protected\def\definelinenote[#1]#*[#2]#*[#3]%
+  {\ifarguments
+     % error
+   \orelse\ifcsname\??linenote#1\endcsname
+     % there might be files that define the default 'linenote'
+     \ifparameters\or\or
+       \setupnote[#1][#2]%
+     \or
+       \setupnote[#1][#3]%
+     \fi
+   \else
+     \ifparameters\or
+       \definenote[#1]%
+     \or
+       \definenote[#1][#2]%
+     \or
+       \definenote[#1][#2][#3]%
+     \fi
+     \pushmacro\currentnote
+     \edef\currentnote{#1}
+     \letcsname\??linenote\currentnote\expandafter\endcsname\csname\currentnote\endcsname % use copy command
+     \frozen\instance\setuevalue        {\currentnote}{\strc_linenotes_direct{\currentnote}}%
+     \frozen\instance\setuevalue{\e!start\currentnote}{\strc_linenotes_start {\currentnote}}%
+     \frozen\instance\setuevalue{\e!stop \currentnote}{\strc_linenotes_stop                }%
+     \the\everydefinelinenote
+     \popmacro\currentnote
+   \fi}
+
+\protected\def\strc_linenotes_direct#1#2%
+  {\global\advance\c_strc_linenotes\plusone
+   \strc_linenotes_indeed{#1}{\the\c_strc_linenotes}{#2}%
+   \strc_linenotes_traced\empty
+   \normalexpanded{\someline[\the\c_strc_linenotes]}}
+
+\protected\def\strc_linenotes_start#1[#2]#3%
+  {\global\advance\c_strc_linenotes\plusone
+   \keepunwantedspaces
+   \strc_linenotes_indeed{#1}{#2}{#3}%
+   \strc_linenotes_traced{#2}%
+   \startline[#2]}
+
+\protected\def\strc_linenotes_stop[#1]%
+  {\stopline[#1]}
+
+\let\m_page_lines_previous_to  \relax
+\let\m_page_lines_previous_from\relax
+
+\let\m_page_lines_current_to   \relax
+\let\m_page_lines_current_from \relax
+
+\newconditional\c_page_lines_current_to
+\newconditional\c_page_lines_current_from
+
+\installcorenamespace{linenotespreviousfrom}
+\installcorenamespace{linenotespreviousto}
+
+\letvalue\??linenotespreviousfrom\empty
+\letvalue\??linenotespreviousto  \empty
+
+% maybe do this in lua
+
+\def\page_lines_in_from{\in[lr:b:\currentlinenotereference]}
+\def\page_lines_in_to  {\in[lr:e:\currentlinenotereference]}
+
+\protected\def\strc_linenotes_range_normal#1% order
+  {\doifelsereferencefound{lr:b:\currentlinenotereference}\settrue\setfalse\c_page_lines_current_from
+   \ifconditional\c_page_lines_current_from
+      \xdef\m_page_lines_current_from{\currentreferencelinenumber}%
+      \doifelsereferencefound{lr:e:\currentlinenotereference}\settrue\setfalse\c_page_lines_current_to
+      \ifconditional\c_page_lines_current_to
+        \xdef\m_page_lines_current_to{\currentreferencelinenumber}%
+        \page_lines_in_from
+        \ifx\m_page_lines_current_from\m_page_lines_current_to \else
+          \endash
+          \page_lines_in_to
+        \fi
+      \else
+        \page_lines_in_from
+      \fi
+   \else
+     \page_lines_in_from
+   \fi}
+
+\protected\def\strc_linenotes_range_sparse#1% order
+  {\doifelsereferencefound{lr:b:\currentlinenotereference}\settrue\setfalse\c_page_lines_current_from
+   \ifconditional\c_page_lines_current_from
+     \xdef\m_page_lines_current_from{\currentreferencelinenumber}%
+     \doifelsereferencefound{lr:e:\currentlinenotereference}\settrue\setfalse\c_page_lines_current_to
+     \ifconditional\c_page_lines_current_to
+       \xdef\m_page_lines_current_to{\currentreferencelinenumber}%
+       \ifx\m_page_lines_previous_from\m_page_lines_current_from
+         \ifx\m_page_lines_previous_to\m_page_lines_current_to \else
+           \page_lines_in_from
+           \ifx\m_page_lines_current_from\m_page_lines_current_to\else\endash\page_lines_in_to\fi
+         \fi
+       \else
+         \page_lines_in_from
+         \ifx\m_page_lines_current_from\m_page_lines_current_to\else\endash\page_lines_in_to\fi
+       \fi
+     \else
+       \page_lines_in_from
+     \fi
+   \else
+     \ifx\m_page_lines_previous_from\m_page_lines_current_from \else
+       \page_lines_in_from
+     \fi
+   \fi}
+
+\let\currentlinenotereference\empty
+
+\protected\def\strc_linenotes_indeed#1#2#3%
+  {\begingroup
+   % we keep things local so we can use it as regular note too
+   \edef\currentnotation{#1}%
+   \edef\currentlinenotereference{#2}%
+   \xdef\m_page_lines_previous_from{\begincsname\??linenotespreviousfrom\currentnotation\endcsname}%
+   \xdef\m_page_lines_previous_to  {\begincsname\??linenotespreviousto  \currentnotation\endcsname}%
+   \strc_linenotes_check_compression
+   \let\currentnote\currentnotation
+   \letnotationparameter\c!numbercommand\linenotelinenumber% todo: deep hook
+   \letnoteparameter    \c!textcommand  \gobbleoneargument % todo: deep hook
+   \csname\??linenote\currentnotation\endcsname{#3}%
+   \global\letcsname\??linenotespreviousfrom\currentnotation\endcsname\m_page_lines_current_from
+   \global\letcsname\??linenotespreviousto  \currentnotation\endcsname\m_page_lines_current_to
+   \endgroup}
+
+% compression
+
+\installcorenamespace{linenotescompressmethod}
+
+% compress=yes|no
+% compressmethod=separator|stopper
+
+\setvalue{\??linenotescompressmethod\v!separator}%
+  {\edef\p_compressseparator{\noteparameter\c!compressseparator}%
+   \scratchskip\noteparameter\c!compressdistance\relax
+   \ifempty\p_compressseparator
+     \hskip\scratchskip
+   \else
+     \hskip.5\scratchskip
+     \begingroup\p_compressseparator\endgroup
+     \hskip.5\scratchskip
+   \fi}
+
+\setvalue{\??linenotescompressmethod\v!stopper}%
+  {\edef\p_compressstopper{\noteparameter\c!compressstopper}%
+   \scratchskip\noteparameter\c!compressdistance\relax
+   \ifempty\p_compressstopper
+     \hskip\scratchskip
+   \else
+     \begingroup\p_compressstopper\endgroup
+     \hskip.5\scratchskip
+   \fi}
+
+\setvalue{\??linenotescompressmethod\v!space}%
+  {\hskip\noteparameter\c!compressdistance\relax}
+
+\def\strc_linenotes_check_compression
+  {\edef\p_linenotes_compress      {\noteparameter\c!compress}%
+   \edef\p_linenotes_compressmethod{\noteparameter\c!compressmethod}%
+   \ifx\p_linenotes_compress\v!yes
+     \let\linenotelinenumber\strc_linenotes_range_sparse
+   \else
+     \let\linenotelinenumber\strc_linenotes_range_normal
+   \fi
+   \ifcsname\??linenotescompressmethod\p_linenotes_compressmethod\endcsname \else
+      \let\p_linenotes_compressmethod\v!space
+   \fi}
+
+\def\strc_linenotes_inbetween % \ifcsname\??linenote\currentnote\expandafter\endcsname
+  {\begincsname\??linenotescompressmethod\p_linenotes_compressmethod\endcsname}
+
+\def\strc_notes_compress_distance{\emwidth \s!plus .5\emwidth \s!minus .25\emwidth}
+
+\setupnotes
+  [%c\compress=\v!no,
+   \c!compressdistance=\strc_notes_compress_distance,
+   \c!compressseparator=\symbol{\v!compressseparator},
+   \c!compressstopper=\symbol{\v!compressstopper}]
+
+\appendtoks
+    \letnoteparameter\c!inbetween\strc_linenotes_inbetween
+\to \everydefinelinenote
+
+% where to hook this one in? resetcounter has no hook:
+
+\permanent\protected\def\doresetlinenotecompression#1% \strc_linenotes_reset_previous
+  {\global\letcsname\??linenotespreviousfrom#1\endcsname\empty
+   \global\letcsname\??linenotespreviousto  #1\endcsname\empty}
+
+\definesymbol
+  [\v!compressseparator]
+  [\hbox{\vl\thinspace\vl}] % \space removed
+
+\definesymbol
+  [\v!compressstopper]
+  [,]
+
+% \setupnotations
+%   [%c\compress=\v!no,
+%    \c!compressseparator=\symbol\v!compressseparator]
+
+\let\strc_linenotes_traced\gobbleoneargument
+
+\def\strc_linenotes_traced_indeed#1%
+  {\iftracelinenotes
+     \hpack to \zeropoint
+       {\forgetall
+        \hsize\zeropoint
+        \hss
+        \vpack to \strutheight{\llap{\red\infofont\setstrut\the\c_strc_linenotes}\vss}%
+        {\color[blue]{\vl}}%
+        \vpack to \strutheight{\rlap{\red\infofont\setstrut#1}\vss}%
+        \hss}%
+      \prewordbreak
+   \fi}
+
+\permanent\protected\def\tracelinenotes
+  {\let\strc_linenotes_traced\strc_linenotes_traced_indeed}
+
+% We predefine one, namely \type {\linenote} cum suis.
+
+\definelinenote[\v!linenote]
+
+%D Use these when not properly nested:
+
+\aliased\let\fromlinenote\startlinenote
+\aliased\let\tolinenote  \stoplinenote
+
+% beware: line numbers are added later on so grouping setups is a bad idea
+%
+% \startbuffer[test]
+% \startlinenumbering[100]
+% test \linenote {oeps 1} test test test test test test
+% test \startlinenote [well] {oeps X} test test test test test test
+% test \linenote {oeps 2} test test test test test test
+% test \linenote {oeps 3} test test test test test test
+% test \linenote {oeps 4} test test test test test test
+% test \linenote {oeps 5} test test test test test test
+% test \stoplinenote [well] test test test test test test
+% \stoplinenumbering
+% \stopbuffer
+%
+% \typebuffer[test] \getbuffer[test] \page
+%
+% \startbuffer[setup]
+% \setuplinenumbering
+%   [align=flushleft]
+% \stopbuffer
+%
+% \typebuffer[setup] \getbuffer[setup,test] \page
+%
+% \startbuffer[setup]
+% \setuplinenumbering
+%   [width=4em,
+%    distance=1em,
+%    align=flushright]
+% \stopbuffer
+%
+% \typebuffer[setup] \getbuffer[setup,test] \page
+%
+% \startbuffer[setup]
+% \setuplinenumbering
+%   [width=4em,
+%    align=flushleft]
+% \stopbuffer
+%
+% \typebuffer[setup] \getbuffer[setup,test] \page
+%
+% \startbuffer[setup]
+% \setuplinenumbering
+%   [width=2em,
+%    distance=.5em,
+%    align=middle]
+% \stopbuffer
+%
+% \typebuffer[setup] \getbuffer[setup,test] \page
+%
+% \startbuffer[setup]
+% \setuplinenumbering
+%   [conversion=romannumerals,
+%    start=1,
+%    step=1,
+%    location=text,
+%    style=slanted,
+%    color=blue,
+%    width=1.5em]
+% \stopbuffer
+%
+% \typebuffer[setup] \getbuffer[setup] \startnarrower\getbuffer[test]\stopnarrower \page
+%
+% \startbuffer[setup]
+% \setuplinenumbering
+%   [width=4em,
+%    left=--,
+%    right=--,
+%    align=middle]
+% \stopbuffer
+%
+% \typebuffer[setup] \getbuffer[setup,test] \page
+%
+% \startbuffer[setup-1]
+% \setuplinenumbering
+%   [style=\bfxx,
+%    command=\WatchThis]
+% \stopbuffer
+%
+% \startbuffer[setup-2]
+% \def\WatchThis#1%
+%   {\ifodd\linenumber
+%      \definecolor[linecolor][red]%
+%    \else
+%      \definecolor[linecolor][green]%
+%    \fi
+%    \inframed
+%      [offset=1pt,frame=off,background=color,backgroundcolor=linecolor]
+%      {#1}}
+% \stopbuffer
+%
+% \typebuffer[setup-1,setup-2] \getbuffer[setup-1,setup-2,test] \page
+%
+% \startbuffer[setup-1]
+% \setuplinenumbering
+%   [location=inright,
+%    style=\bfxx,
+%    command=\WatchThis]
+% \stopbuffer
+%
+% \typebuffer[setup-1] \getbuffer[setup-1,setup-2,test] \page
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/strc-lst.mklx b/tex/context/base/mkiv/strc-lst.mklx
new file mode 100644
index 000000000..2e088766a
--- /dev/null
+++ b/tex/context/base/mkiv/strc-lst.mklx
@@ -0,0 +1,1566 @@
+%D \module
+%D   [       file=strc-lst,
+%D        version=2008.10.20,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Lists,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Structure Macros / Lists}
+
+\registerctxluafile{strc-lst}{}
+
+% clean up in progress ...
+%
+% also (long term) todo:
+%
+% autocrossdocument
+% auto refs to lists (chain)
+%
+% TODO: strut=yes|no
+%
+% \lists -> strc_lists
+
+\unprotect
+
+%D Lists are mostly used for tables of contents but are in fact a rather generic
+%D feature of \CONTEXT. We seperate between storage and rendering and the current
+%D implementation is a reworked version of all that was added in steps. As lists
+%D are used frequently compatibility is an important aspect. A couple of rendering
+%D alternatives are provided here but more are possible.
+
+\installcorenamespace{list}
+
+\installframedcommandhandler \??list {list} \??list
+
+\aliased\let\setuplists\setuplist % yes or no
+
+\setuplist
+  [\c!height=\v!broad,
+   \c!depth=\v!broad,
+   \c!offset=.25\emwidth,
+   \c!state=\v!start,
+   \c!coupling=\v!off,
+   \c!criterium=\v!local,
+   \c!reference=,% was number which was sort of obsolete
+   \c!width=3\emwidth,
+  %\c!maxwidth=,
+   \c!distance=\zeropoint,
+   \c!margin=\zeropoint,
+   \c!alternative=\c!b,
+   \c!style=\v!normal,
+  %\c!color=,
+   \c!textstyle=\listparameter\c!style,   % \currentliststyleparameter (but then we need to set it in every ...)
+   \c!numberstyle=\listparameter\c!style, % \currentliststyleparameter
+   \c!pagestyle=\listparameter\c!style,   % \currentliststyleparameter
+   \c!textcolor=\listparameter\c!color,   % \currentlistcolorparameter (but then we need to set it in every ...)
+   \c!numbercolor=\listparameter\c!color, % \currentlistcolorparameter
+   \c!pagecolor=\listparameter\c!color,   % \currentlistcolorparameter
+   \c!numbercommand=\firstofoneargument,
+   \c!textcommand=\firstofoneargument,
+   \c!pagecommand=\firstofoneargument,
+   \c!pagenumber=\v!yes, % better: 'first'
+   \c!headnumber=\v!yes, % better: 'second'
+%  \c!sectionnumber=\listparameter\c!headnumber, % use this instead
+   \c!interaction=\v!all, % was \v!sectionnumber, % or make this headnumber (or accept both)
+   \c!label=\v!no,
+  %\c!extras=,
+  %\c!aligntitle=,
+  %\c!before=,
+  %\c!after=,
+  %\c!inbetween=,
+  %\c!symbol=,
+  %\c!expansion=,
+   \c!limittext=\languageparameter\c!limittext] % not used currently
+
+%D Helpers:
+
+\permanent\protected\def\usenestedliststyleandcolor#style#color% will change
+  {\useliststyleandcolor#style#color%
+   % how about style
+   \ifempty\currentcolorparameter \else
+     \resetinteractionparameter\c!color
+     \resetinteractionparameter\c!contrastcolor
+   \fi}
+
+\permanent\protected\def\doifelselist#tag% can also move to \installcommandhandler
+  {\ifcsname\namedlisthash{#tag}\s!parent\endcsname
+     \expandafter\firstoftwoarguments
+   \else
+     \expandafter\secondoftwoarguments
+   \fi}
+
+\aliased\let\doiflistelse\doifelselist
+
+%D Regular list entries are bound to a specific location in order to get the right
+%D pagenumber etc.\ associated. When pushing something inbetween (in mkiv) it ends
+%D up directtly in the list. This is the default because otherwise users will wonder
+%D why spacing might get messed up (due to an unseen but present node). It is
+%D possible to force a location by explicitly setting \type {location} to \type
+%D {here}.
+%D
+%D Another way to force a certain order is to set the \type {order} variable when
+%D placing a list. The \type {command} option only pushes commands into the right
+%D order, and \type {all} orders all entries (which might be too much). In this case
+%D no specific location is needed with the inbetween method. Maybe additional
+%D mechanisms show up some day. See \type {inbetween-001.tex} for an example.
+
+% command  : location=none
+% userdata : location=none
+% simple   : location=here
+
+\installcorenamespace {listlocations}
+
+% \permanent\protected\def\doifelseinlistentry#1%
+%   {\ifcsname\??listlocations#1\endcsname
+%      \ifnum\lastnamedcs=\structurelistlocation\relax
+%        \doubleexpandafter\firstoftwoarguments
+%      \else
+%        \doubleexpandafter\secondoftwoarguments
+%      \fi
+%    \else
+%      \expandafter\secondoftwoarguments
+%    \fi}
+
+\permanent\protected\def\doifelseinlistentry#1%
+  {\unless\ifcsname\??listlocations#1\endcsname
+     \expandafter\secondoftwoarguments
+   \orelse\ifnum\lastnamedcs=\structurelistlocation\relax
+     \expandafter\firstoftwoarguments
+   \else
+     \expandafter\secondoftwoarguments
+   \fi}
+
+\permanent\protected\def\doifelseincurrentlistentry
+  {\doifelseinlistentry\currentlist}
+
+\permanent\protected\def\structurelistinject[#tag]%
+  {\begingroup
+   \edef\currentlist{#tag}%
+   \doifelse{\listparameter\c!state}\v!start\strc_lists_inject_yes\strc_lists_inject_nop}
+
+\tolerant\protected\def\strc_lists_inject_nop[#settings]#spacer[#userdata]%
+  {\endgroup}
+
+\def\strc_lists_inject_enhance#listindex%
+  {\expandafter\clf_deferredenhancelist\number#listindex\relax}
+
+\tolerant\protected\def\strc_lists_inject_yes[#settings]#spacer[#userdata]% can be used directly
+  {\setupcurrentlist[\c!type=userdata,\c!location=\v!none,#settings]% grouped (use \let...
+   \edef\p_location{\listparameter\c!location}%
+   \setnextinternalreference
+   \scratchcounter\clf_addtolist
+        references {
+            internal \locationcount
+          % block    {\currentsectionblock}
+          % section  structures.sections.currentid()
+          % location {\p_location}
+        }
+        metadata {
+            kind     {\listparameter\c!type}
+            name     {\currentlist}
+          % level    structures.sections.currentlevel()
+            catcodes \catcodetable
+        }
+        userdata {\detokenize\expandafter{\normalexpanded{#userdata}}}
+   \relax
+   \edef\currentlistnumber{\the\scratchcounter}%
+   \setxvalue{\??listlocations\currentlist}{\the\locationcount}%
+   \ifx\p_location\v!here
+     % this branch injects nodes !
+     \strc_lists_inject_enhance{\currentlistnumber}%
+     \clf_setinternalreference
+        internal \locationcount
+        view     {\interactionparameter\c!focus}%
+     \relax % this will change
+     \xdef\currentstructurelistattribute{\the\lastdestinationattribute}%
+     \dontleavehmode\hpack attr \destinationattribute \lastdestinationattribute{}% todo
+   \else
+     % and this one doesn't
+     \clf_enhancelist\currentlistnumber\relax
+   \fi
+   \endgroup}
+
+% todo: make like \strc_references_direct_full_user ... with {}{}{}
+
+\protected\def\strc_lists_inject_direct[#tag]% [#settings][#userdata]
+  {\begingroup
+   \edef\currentlist{#tag}%
+   \strc_lists_inject_yes} % [#settings][#userdata]
+
+\permanent\protected\def\writebetweenlist[#tag]%
+  {\begingroup
+   \edef\currentlist{#tag}%
+   \doifelse{\namedlistparameter{#tag}\c!state}\v!start
+     \strc_lists_write_between_yes
+     \strc_lists_write_between_nop}
+
+\tolerant\def\strc_lists_write_between_yes[#settings]#:#command%
+  {\strc_lists_inject_yes[#settings,\c!type=\s!command][command={#command}]}
+
+\tolerant\def\strc_lists_write_between_nop[#settings]#:#command%
+  {\endgroup}
+
+\permanent\protected\def\writedatatolist[#tag]%
+  {\begingroup
+   \edef\currentlist{#tag}%
+   \doifelse{\namedlistparameter{#tag}\c!state}\v!start
+     \strc_lists_write_data_to_yes
+     \strc_lists_write_data_to_nop}
+
+\tolerant\def\strc_lists_write_data_to_yes[#settings]#spacer[#userdata]%
+  {\ifthirdargument % no need to have an extra step ... used seldom
+     \strc_lists_inject_yes[#settings,\c!type=\s!userdata][#userdata]%
+   \else
+     \strc_lists_inject_yes[\c!type=\s!userdata][#settings]%
+   \fi}
+
+\tolerant\def\strc_lists_write_data_to_nop[#settings]#spacer[#userdata]%
+  {\endgroup}
+
+\permanent\protected\def\writetolist[#tag]%
+  {\begingroup
+   \edef\currentlist{#tag}%
+   \doifelse{\namedlistparameter{#tag}\c!state}\v!start
+     \strc_lists_write_to_yes
+     \strc_lists_write_to_nop}
+
+\tolerant\def\strc_lists_write_to_yes[#settings]#:#first#second% no \s!first because we don't expand user settings
+  {\strc_lists_inject_yes[\c!location=\v!here,#settings,\c!type=\s!simple][first={#first},second={#second}]}
+
+\tolerant\def\strc_lists_write_to_nop[#settings]#:#first#second%
+  {\endgroup} % \strc_lists_inject_nop[][]
+
+%D When placing a list either one or a set can be giving. This makes it possible to
+%D flush for instance an nested (or merged) table of contents. Keep in mind that
+%D placing a list is what we do most (think of tables of contents, figures, etc.\
+%D but other usage is also possible in which case low level commands have to be
+%D used.
+
+\newtoks\everystructurelist
+
+\permanent\tolerant\protected\def\placelist[#taglist]#spacer[#settings]%
+  {\begingroup
+   \startpacked[\v!blank]%
+   \edef\m_list {#taglist}%
+   \edef\m_first{\firststructureelementinlist{#taglist}}%
+   \ifx\m_list\m_first
+      % use settings of first
+   \else
+      % use settings of root
+      \let\m_first\empty
+   \fi
+   \strc_lists_place_indeed\m_first\m_list{#settings}%
+   \stoppacked
+   \endgroup}
+
+\permanent\tolerant\protected\def\placerawlist[#tag]#spacer[#settings]% just one list
+  {\strc_lists_place_indeed\empty{#tag}{#settings}}
+
+\aliased\let\strc_lists_place\placelist % used in strc-flt
+
+\def\strc_lists_place_indeed#tag#list#settings%
+  {\begingroup
+   \the\t_lists_every_renderingcleanup % \let\currentlistentrylocation\empty
+   \edef\currentlist{#tag}%
+   \setupcurrentlist[#settings]%
+   \the\everystructurelist
+ % \doif{\listparameter\c!coupling}\v!on{\startlistreferences{#tag}}%
+   \strc_lists_place_current % maybe inline
+     {#list}%
+     {\listparameter\c!criterium}%
+     {\listparameter\c!reference}%
+     {\listparameter\c!extras}%
+     {\listparameter\c!order}%
+ % \stoplistreferences
+   \par % todo: only when vertical list mode
+   \endgroup
+   \strc_lists_set_mode}
+
+\def\strc_lists_set_mode
+  {\ifcase\structurelistsize\relax
+     \resetsystemmode\v!list
+   \else
+     \setsystemmode  \v!list
+   \fi}
+
+%D Complete lists are just lists but with a title. They were originally introduced
+%D to minimize the number for commands in a document source but nowadays that is
+%D less an issue in the sense that the extra few lines are neglectable to the rest.
+
+\ifdefined\startnamedsection \else \let\startnamedsection\relax \fi
+\ifdefined\stopnamedsection  \else \let\stopnamedsection \relax \fi
+\ifdefined\headtext          \else \let\headtext         \relax \fi
+
+\permanent\tolerant\protected\def\completelist[#tag]#spacer[#settings]%
+  {\normalexpanded{\startnamedsection[\v!title][\c!title=\headtext{#tag},\c!reference=#tag]}% {} around ref ?
+   \strc_lists_place[#tag][#settings]%
+   \stopnamedsection}
+
+\permanent\tolerant\protected\def\strc_lists_complete[#singular]#spacer[#plural]#spacer[#settings]% used in strc-flt
+  {\normalexpanded{\startnamedsection[\v!title][\c!title=\headtext{#plural},\c!reference=#singular]}% {} around ref ?
+   \strc_lists_place[#singular][#settings]%
+   \stopnamedsection}
+
+%D Combined list provide a nice level of abstraction.
+%D
+%D \starttyping
+%D \definecombinedlist[whatever][a,b,c][settings]
+%D \stoptyping
+
+\permanent\tolerant\protected\def\definecombinedlist[#tag]#spacer[#list]#spacer[#settings]%
+  {\definelist[#tag][\c!criterium=\v!local,\c!reference=,\c!alternative=,\c!list={#list},#settings]% inherits from root
+   \frozen\instance\setvalue{\e!setup#tag\e!endsetup}{\setupcombinedlist[#tag]}%
+   \frozen\instance\setvalue{\e!place#tag}{\placecombinedlist[#tag]}%
+   \frozen\instance\setvalue{\e!complete#tag}{\strc_lists_complete[#tag]}}
+
+\permanent\tolerant\protected\def\setupcombinedlist[#tag]#spacer[#settings]%
+  {\ifarguments\or\or
+     \setuplist[#tag][#settings]% we don't want to mess up the parent
+   \fi}
+
+\permanent\tolerant\protected\def\placecombinedlist[#tag]#spacer[#settings]% i.e. no list set in settings
+  {\begingroup
+   \edef\currentlist{#tag}%
+   \setupcurrentlist[#settings]%
+   \edef\m_strc_list_alternative{\listparameter\c!alternative}% we only inherit alternative
+   \strc_lists_place_indeed{#tag}{\listparameter\c!list}{#settings}%
+   \endgroup}
+
+%D Given that some variables are set, we can ask for some properties of
+%D an entry.
+
+\mutable\def\currentstructurelistnumber{0}     % injection
+\mutable\def\currentlistmethod         {entry} % typesetting
+\mutable\def\currentlistindex          {0}     % typesetting (maybe also a real counter)
+
+\permanent\protected\def\savedlistnumber        #1#2{\clf_savedlistnumber        {#1}\numexpr#2\relax}
+\permanent\protected\def\savedlisttitle         #1#2{\clf_savedlisttitle         {#1}\numexpr#2\relax}
+\permanent\protected\def\savedlistprefixednumber#1#2{\clf_savedlistprefixednumber{#1}\numexpr#2\relax}
+
+\newconditional\c_lists_show_realpage
+
+\installcorenamespace {listpagenumber}
+
+\setvalue{\??listpagenumber\v!always  }{\settrue\c_lists_show_page\settrue\c_lists_has_page}
+\setvalue{\??listpagenumber\v!yes     }{\settrue\c_lists_show_page}
+\setvalue{\??listpagenumber\s!realpage}{\settrue\c_lists_show_page\settrue\c_lists_show_realpage}
+
+\def\strc_lists_process_pagenumber#1%
+  {\begincsname\??listpagenumber#1\endcsname}
+
+\def\structurelistlocation
+  {\clf_listlocation\numexpr\currentlistindex\relax}
+
+\def\structurelistrealpagenumber
+  {\clf_listrealpage{\currentlist}\numexpr\currentlistindex\relax}
+
+\protected\def\structurelistpagenumber
+  {\dostarttagged\t!listpage\empty
+   \ifconditional\c_lists_show_realpage
+     \clf_listrealpage{\currentlist}\numexpr\currentlistindex\relax
+   \else
+     \clf_listprefixedpage
+       {\currentlist}%
+       \currentlistindex
+       {
+         separatorset  {\listparameter\c!pageprefixseparatorset}
+         conversionset {\listparameter\c!pageprefixconversionset}
+         set           {\listparameter\c!pageprefixset}
+         segments      {\listparameter\c!pageprefixsegments}
+         connector     {\listparameter\c!pageprefixconnector}
+       }%
+       {
+         prefix        {\listparameter\c!pageprefix}
+         conversionset {\listparameter\c!pageconversionset}
+         starter       {\listparameter\c!pagestarter}
+         stopper       {\listparameter\c!pagestopper}
+       }%
+     \relax
+   \fi
+   \dostoptagged}
+
+\permanent\protected\def\structurelistuservariable#name%
+  {\dostarttagged\t!listdata{#name}%
+   \clf_listuserdata{\currentlist}\currentlistindex{#name}%
+   \dostoptagged}
+
+\permanent\def\rawstructurelistuservariable#name%
+  {\clf_listuserdata{\currentlist}\currentlistindex{#name}}
+
+\permanent\protected\def\structurelistfirst {\structurelistuservariable\s!first } % s!
+\permanent\protected\def\structurelistsecond{\structurelistuservariable\s!second} % s!
+
+\permanent\def\rawstructurelistfirst {\rawstructurelistuservariable\s!first } % s! % was \protected
+\permanent\def\rawstructurelistsecond{\rawstructurelistuservariable\s!second} % s! % was \protected
+
+\permanent\protected\def\doifelsestructurelisthaspage
+  {\clf_doifelselisthaspage{\currentlist}\numexpr\currentlistindex\relax}
+
+\permanent\protected\def\doifelsestructurelisthasnumber
+  {\clf_doifelselisthasnumber{\currentlist}\numexpr\currentlistindex\relax}
+
+\aliased\let\doifstructurelisthaspageelse  \doifelsestructurelisthaspage
+\aliased\let\doifstructurelisthasnumberelse\doifelsestructurelisthasnumber
+
+\permanent\protected\def\structurelistgenerictitle
+  {\dostarttagged\t!listcontent\empty
+   \clf_listtitle{\currentlist}\currentlistindex\relax
+   \dostoptagged}
+
+\permanent\protected\def\structurelistgenericnumber % tricky, we need to delay tagging as we have nested lua calls
+  {\dostarttagged\t!listtag\empty
+   \clf_listprefixednumber
+     {\currentlist}%
+     \currentlistindex
+     {%
+         prefix        {\listparameter\c!prefix}%
+         separatorset  {\listparameter\c!prefixseparatorset}%
+         conversionset {\listparameter\c!prefixconversionset}%
+         starter       {\listparameter\c!prefixstarter}%
+         stopper       {\listparameter\c!prefixstopper}%
+         set           {\listparameter\c!prefixset}%
+         segments      {\listparameter\c!prefixsegments}%
+         connector     {\listparameter\c!prefixconnector}%
+     }%
+     {%
+         separatorset  {\listparameter\c!numberseparatorset}%
+         conversionset {\listparameter\c!numberconversionset}%
+         starter       {\listparameter\c!numberstarter}%
+         stopper       {\listparameter\c!numberstopper}%
+         segments      {\listparameter\c!numbersegments}%
+     }%
+   \relax
+   \dostoptagged}
+
+% TODO: pass extra tag name (contents, figures, bibliography ...)
+
+\protected\def\strc_lists_place_current#list#criterium#reference#extras#order% beware, not a user command
+  {\dostarttaggedchained\t!list\empty\??list
+   \clf_processlist
+        names     {#list}
+        criterium {#criterium}
+        reference {#reference}
+        extras    {#extras}
+        order     {#order}
+   \relax
+   \dostoptagged}
+
+\protected\def\strc_lists_analyze#list#criterium#reference%
+  {\clf_analyzelist
+        names     {#list}
+        criterium {#criterium}
+        reference {#reference}
+   \relax}
+
+\permanent\def\firststructureelementinlist#list% expandable
+  {\firstinset{#list}}
+
+\permanent\def\structurelistsize
+  {\clf_listsize}
+
+%D Depending on what kind of list we have (e.g.\ a section related one) processors
+%D can be defined.
+
+% push pop test:
+%
+% \starttext
+%   \placelist[chapter] [after={\placelist[section][criterium=local]}]
+%   \chapter{One} \section{Alpha} \section{Beta}
+%   \chapter{Two} \section{First} \section{Second}
+% \stoptext
+
+\installcorenamespace{structurelistprocessor} % the topmost list handler
+\installcorenamespace{listextra}              % control of that handler
+
+\installcommandhandler \??listextra {listextra} \??listextra
+
+\definelistextra % example
+  [\v!page]
+  [\c!before={\showmessage\m!system{14}{\currentlist/\currentlistindex}\page}]
+
+\permanent\protected\def\installstructurelistprocessor#tag#meaning%
+  {\expandafter\normaldef\csname\??structurelistprocessor#tag\endcsname{#meaning}}
+
+\permanent\def\usestructurelistprocessor#tag%
+  {\csname\??structurelistprocessor#tag\endcsname}
+
+\let\dotaglistlocation\relax
+
+\def\strc_lists_entry_process_default
+  {no list method}
+
+\def\strc_lists_entry_process % assume things to be set up
+  {\listextraparameter\c!before
+   \dostarttagged\t!listitem\currentlist
+   \dotaglistlocation
+   \ifcsname\??structurelistprocessor\currentlist:\currentlistmethod\endcsname\lastnamedcs\orelse
+   \ifcsname\??structurelistprocessor\currentlistmethod             \endcsname\lastnamedcs\orelse
+   \ifcsname\??structurelistprocessor\currentlist                   \endcsname\lastnamedcs\else
+                                                         \strc_lists_entry_process_default\fi
+   \dostoptagged
+   \listextraparameter\c!after}
+
+\protected\def\strclistsentryprocess#tag#method#index#extra% This one is called at the lua end!
+  {\clf_pushlist#index\relax
+  %\let\currentlistentrylocation\empty
+   \edef\currentlist      {#tag}%
+   \edef\currentlistmethod{#method}%
+   \edef\currentlistindex {#index}%
+   \edef\currentlistextra {#extra}%
+   \strc_lists_entry_process
+   \clf_poplist}
+
+% lists that have a number/title are kind of generic and can share code
+
+\installstructurelistprocessor\s!default
+  {\strc_lists_entry_process_default}
+
+\installstructurelistprocessor\s!simple
+  {\let\currentlistentrynumber    \structurelistfirst
+   \let\currentlistentrytitle     \structurelistsecond
+   \let\currentlistentrypagenumber\structurelistpagenumber
+   \strc_lists_apply_renderingsetup}
+
+\installstructurelistprocessor\s!command
+  {\clf_listuserdata{\currentlist}\currentlistindex{\s!command}}
+
+\installstructurelistprocessor{section}
+  {\let\currentlistentrynumber    \structurelistgenericnumber
+   \let\currentlistentrytitle     \structurelistgenerictitle
+   \let\currentlistentrypagenumber\structurelistpagenumber
+   \strc_lists_apply_renderingsetup}
+
+\installstructurelistprocessor{number+title}
+  {\let\currentlistentrynumber    \structurelistgenericnumber
+   \let\currentlistentrytitle     \structurelistgenerictitle
+   \let\currentlistentrypagenumber\structurelistpagenumber
+   \strc_lists_apply_renderingsetup}
+
+% example of usage elsewhere:
+%
+% \installstructcurelistprocessor{pubs:userdata}
+%   {\clf_listuserdata{\currentlist}\currentlistindex{bibref}}
+
+%D List symbols are used in interactive documents where no numbers are used but
+%D nevertheless structure is present. Beware, the list symbol macro gets an argument
+%D passed, i.e. when this argument is not picked up, the symbol becomes a kind of
+%D prefix. It's not really a user command (and might even get protected).
+
+\permanent\protected\def\listsymbol[#tag]#number%
+  {\begingroup
+   \edef\currentlist{#tag}%
+   \def\currentlistentrynumber{#number}% no edef else tag problems
+   \currentlistsymbol
+   \endgroup}
+
+%D For historical reasons we're stuck to symbols, so in order to generalize, we have
+%D to hook it into the symbol handle. One way to deal with this is to use a
+%D different key and as it makes sense to use setups instead of def's we use a new
+%D key \quote {renderingsetup} which is the name of a setup.
+
+\def\strc_lists_assign_dimen#dimension#key#default%
+  {\edef\m_strc_list_dimen{\listparameter#key}%
+   \doifelseinset\m_strc_list_dimen{\v!fit,\v!broad}{#dimension#default}{#dimension\m_strc_list_dimen}\relax}
+
+\definesymbol[\v!list][\v!none   ][\strc_lists_symbol_none]
+\definesymbol[\v!list][\v!one    ][\strc_lists_symbol_one]
+\definesymbol[\v!list][\v!two    ][\strc_lists_symbol_two]
+\definesymbol[\v!list][\v!three  ][\strc_lists_symbol_three]
+\definesymbol[\v!list][\s!default][\strc_lists_symbol_default]
+\definesymbol[\v!list][\s!unknown][\strc_lists_symbol_unknown]
+
+\permanent\protected\def\currentlistsymbol
+  {\edef\p_symbol{\listparameter\c!symbol}%
+   \doifelseinsymbolset\v!list\p_symbol
+     {\directsymbol\v!list\p_symbol}
+     {\directsymbol\v!list\s!default}}
+
+\protected\def\strc_lists_symbol_none
+  {\strc_lists_assign_dimen\scratchwidth\c!width{1.5\emwidth}%
+   \hpack to \scratchwidth{}}
+
+\protected\def\strc_lists_symbol_one
+  {\strut\symbol[bullet]}
+
+\protected\def\strc_lists_symbol_two
+  {\vrule\s!width\emwidth\s!height\exheight\s!depth\zeropoint\relax}
+
+\protected\def\strc_lists_symbol_three
+  {\begingroup
+   \strc_lists_assign_dimen\scratchwidth \c!width {1.5\emwidth}%
+   \strc_lists_assign_dimen\scratchheight\c!height\exheight
+   \strc_lists_assign_dimen\scratchdepth \c!depth \zeropoint
+   \vrule\s!width\scratchwidth\s!height\scratchheight\s!depth\scratchdepth
+   \endgroup}
+
+\protected\def\strc_lists_symbol_unknown
+  {\listparameter\c!symbol}
+
+\installcorenamespace{listsymbollabels}
+
+\def\strc_lists_symbol_label_unknown
+  {\leftlabeltext\currentlistlabel
+   \listparameter\c!starter
+   \currentlistentrynumber
+   \listparameter\c!stopper
+   \rightlabeltext\currentlistlabel}
+
+\protected\def\strc_lists_symbol_default
+  {\dontleavehmode
+   \strut
+   \begingroup
+   \edef\currentlistlabel{\listparameter\c!label}% can be used in label
+   \ifcsname\??listsymbollabels\currentlistlabel\endcsname
+      \lastnamedcs
+   \else
+     \strc_lists_symbol_label_unknown
+   \fi
+   \endgroup}
+
+\letvalue{\??listsymbollabels\s!unknown}\strc_lists_symbol_default
+
+\setvalue{\??listsymbollabels}% default (empty)
+  {\listparameter\c!starter
+   \currentlistentrynumber
+   \listparameter\c!stopper}
+
+\setvalue{\??listsymbollabels\v!no}% also default
+  {\listparameter\c!starter
+   \currentlistentrynumber
+   \listparameter\c!stopper}
+
+\setvalue{\??listsymbollabels\v!none}% real minimal (as suggested by WS)
+  {\currentlistentrynumber}
+
+\setvalue{\??listsymbollabels\v!yes}% auto (use value stored in tuc file)
+  {\edef\currentlistlabel{\clf_listlabel\currentlistindex{\currentlistlabel}}%
+   \leftlabeltext\currentlistlabel
+   \listparameter\c!starter
+   \currentlistentrynumber
+   \listparameter\c!stopper
+   \rightlabeltext\currentlistlabel}
+
+% a : nr - tit - pag
+% b : nr - tit - fill - pag
+% c : nr - tit - dots - pag
+% d : inline
+% e : interaction
+% f : interaction
+% g : interaction
+
+\installcorenamespace{listalternative} % specific ways of rendering a list
+\installcorenamespace{listrenderings}  % a namespace for setups (rather local)
+
+\installcommandhandler \??listalternative {listalternative} \??listalternative
+
+% Commands are bound to specific list instances as often these are quite special
+% and don't apply to multiple. So, being strict saves us resets.
+
+% \installcorenamespace{listfiller}
+%
+% \protected\def\installlistfiller#1#2%
+%   {\setuvalue{\??listfiller#1}{#2}}
+%
+% \protected\def\listfiller#1%
+%   {\begincsname\??listfiller#1\endcsname}
+%
+% \protected\def\currentlistfiller
+%   {\begingroup
+%    \edef\p_filler{\listalternativeparameter\c!filler}%
+%    \ifcsname\??listfiller\p_filler\endcsname
+%      \lastnamedcs
+%    \else
+%      \p_filler
+%    \fi
+%    \endgroup}
+%
+% \installlistfiller\v!sym % original one
+%   {\begingroup
+%    \scratchdimen.5\emwidth
+%    \hskip\scratchdimen
+%    \gleaders
+%      \hbox to \scratchdimen
+%        {\hss
+%         \uselistalternativestyleandcolor\c!symstyle\c!symcolor
+%         \listalternativeparameter\c!symbol
+%         \hss}%
+%      \hfill
+%    \hskip\scratchdimen
+%    \endgroup}
+%
+% \installlistfiller\v!symbol % new one (make that default?)
+%   {\begingroup
+%    \scratchdimen.5\emwidth
+%    \hskip\scratchdimen
+%    \gleaders
+%      \hbox spread .5\scratchdimen
+%        {\hss
+%         \uselistalternativestyleandcolor\c!symstyle\c!symcolor
+%         \listalternativeparameter\c!symbol
+%         \hss}%
+%      \hfill
+%    \hskip\scratchdimen
+%    \endgroup}
+%
+% \installlistfiller\v!width
+%   {\hfill}
+%
+% \installlistfiller\v!space
+%   {\hskip.25\emwidth\relax}
+
+\setuplistalternative
+  [\c!command=\directlistparameter\c!command,
+   \c!symbol=.]
+
+\permanent\protected\def\currentlistfiller
+  {\checkedfiller{\listalternativeparameter\c!filler}}
+
+\definelistalternative
+  [a]
+  [\c!distance=0pt,
+   \c!width=2em,
+   \c!stretch=10em,
+   \c!filler=\hskip.25em\relax,
+   \c!renderingsetup=\??listrenderings:abc]
+
+\definelistalternative
+  [b]
+  [\c!distance=5em,
+   \c!width=2em,
+   \c!stretch=10em,
+   \c!filler=\hfill,
+   \c!renderingsetup=\??listrenderings:abc]
+
+\definelistalternative
+  [c]
+  [\c!distance=5em,
+   \c!width=0pt,
+   \c!stretch=10em,
+   \c!filler=\hskip.5em\gleaders\hbox to .5\emwidth{\hss.\hss}\hfill\hskip.5em\relax,
+   \c!renderingsetup=\??listrenderings:abc]
+
+\definelistalternative
+  [d]
+  [\c!renderingsetup=\??listrenderings:d]
+
+\definelistalternative
+  [e]
+  [\c!renderingsetup=\??listrenderings:e]
+
+\definelistalternative
+  [f]
+  [\c!renderingsetup=\??listrenderings:f]
+
+\definelistalternative
+  [g]
+  [\c!renderingsetup=\??listrenderings:g]
+
+\definelistalternative
+  [\v!command]
+  [\c!renderingsetup=\??listrenderings:command]
+
+\definelistalternative
+  [\v!none]
+  [\c!renderingsetup=\??listrenderings:none]
+
+\definelistalternative
+  [\v!vertical]
+  [\c!before=\ifvmode\nointerlineskip\fi,
+   \c!after=\ifvmode\nointerlineskip\fi\endgraf\allowbreak,
+   \c!renderingsetup=\??listrenderings:generic]
+
+\definelistalternative
+  [\v!horizontal]
+  [\c!before=\noindent,
+   \c!after=,
+   \c!renderingsetup=\??listrenderings:generic]
+
+% \setuplist
+%   [section]
+%   [alternative=MyListItem,
+%    after=\blank,
+%    before=\blank]
+%
+% \definelistplacement[MyListItem][command]#1#2#3{(#1) (#2) (#3)}
+% \definelistplacement[MyListItem][command]{\whatever}
+%
+% this is a compatibility command, best use the regular defined with command=
+% either set in the alternative or in the list
+
+\installcorenamespace{listelementcommand} % the old plugin model
+
+\permanent\tolerant\protected\def\definelistplacement[#tag]#spacer[#method]%
+  {\edef\p_method{#method}%
+   \ifempty\p_method
+     \let\p_method\v!command
+   \fi
+   \normalexpanded{\definelistalternative[#tag][\p_method]}[\c!command=\strc_lists_placement_command]%
+   \doifelsenextbgroup
+     {\strc_lists_define_placement_yes{#tag}}
+     {\strc_lists_define_placement_nop{#tag}}}
+
+% indirect definition: <three ignore arguments>: {\bla}
+
+\def\strc_lists_define_placement_yes#tag%
+  {\protected\defcsname\??listelementcommand#tag\endcsname##1##2##3}
+
+% direct definition: <three arguments>{\bla}
+
+\def\strc_lists_define_placement_nop#tag%
+  {\protected\defcsname\??listelementcommand#tag\endcsname}
+
+\def\strc_lists_placement_command
+  {\csname\??listelementcommand\currentlistalternative\endcsname}
+
+%D The rendering macros.
+
+\newbox  \b_strc_lists_number
+\newbox  \b_strc_lists_text
+\newbox  \b_strc_lists_page
+
+\newtoks \t_lists_every_renderingsetup
+\newtoks \t_lists_every_renderingtext
+\newtoks \t_lists_every_renderingsynchronize
+\newtoks \t_lists_every_renderingcleanup
+
+\newconditional\c_lists_has_number
+\newconditional\c_lists_has_page
+\newconditional\c_lists_show_number
+\newconditional\c_lists_show_page
+
+\mutable\let\currentlistentrylocation  \empty % watch the 'entry' in the name
+\mutable\let\currentlistentrynumber    \empty % watch the 'entry' in the name
+\mutable\let\currentlistentrytitle     \empty % watch the 'entry' in the name
+\mutable\let\currentlistentrypagenumber\empty % watch the 'entry' in the name
+
+\appendtoks
+    \dontcomplain
+  % \letinteractionparameter\c!width\zeropoint % a weird one
+\to \t_lists_every_renderingsetup
+
+\appendtoks
+    % better is to use a special list entry but we keep this for compatibility
+    \enforced\let\\\space
+    % so expanding this token register has to come *after* the font switch
+    \dontconvertfont % (**) this has to become an option (see publ)
+\to \t_lists_every_renderingtext
+
+\appendtoks
+    % because we want to avoid redundant lua calls we expand the
+    % location beforehand
+    \ifempty\currentlistentrylocation
+        \edef\currentlistentrylocation{\structurelistlocation}% needs attention
+    \fi
+    % because these tests happen often and because we're dealing with
+    % rather complex composed data we have special conditionals; keep
+    % in mind that testing for empty fails do to tagging being applied
+%   \edef\p_pagenumber{\listparameter\c!pagenumber}%
+%   \ifx\p_pagenumber\v!always
+%     \settrue\c_lists_has_page
+%     \settrue\c_lists_show_page
+%   \else
+%     \doifelsestructurelisthaspage\settrue\setfalse\c_lists_has_page
+%     \ifx\p_pagenumber\v!yes
+%       \settrue\c_lists_show_page
+%     \else
+%       \setfalse\c_lists_show_page
+%     \fi
+%   \fi
+    \setfalse\c_lists_show_page % necessary?
+    \processcommacommand[\listparameter\c!pagenumber]\strc_lists_process_pagenumber
+    \ifconditional\c_lists_has_page \else
+      \doifelsestructurelisthaspage\settrue\setfalse\c_lists_has_page
+    \fi
+    % always forces number placement (in bib we use a forced number)
+    \edef\p_headnumber{\listparameter\c!headnumber}%
+    \ifx\p_headnumber\v!always
+      \settrue\c_lists_has_number
+      \settrue\c_lists_show_number
+    \else
+      \doifelsestructurelisthasnumber\settrue\setfalse\c_lists_has_number
+      \ifx\p_headnumber\v!yes
+        \settrue\c_lists_show_number
+      \else
+        \setfalse\c_lists_show_number
+      \fi
+    \fi
+    \strc_lists_interaction_check
+\to \t_lists_every_renderingsetup
+
+\appendtoks
+    \strc_references_flush_destination_nodes
+\to \t_lists_every_renderingsynchronize
+
+\appendtoks
+   % as we don't want any interference we clear some variables
+   % afterwards
+   \let\currentlistentrylocation  \empty
+   \let\currentlistentrynumber    \empty
+   \let\currentlistentrytitle     \empty
+   \let\currentlistentrypagenumber\empty
+   \setfalse\c_lists_has_page
+   \setfalse\c_lists_has_number
+   \setfalse\c_lists_show_page
+   \setfalse\c_lists_show_realpage
+   \setfalse\c_lists_show_number
+\to \t_lists_every_renderingcleanup
+
+\let\m_strc_list_alternative\empty % combined
+
+\protected\def\strc_lists_apply_renderingsetup
+  {\the\t_lists_every_renderingsetup
+   % now we group
+   \begingroup
+   \ifempty\m_strc_list_alternative
+     \edef\currentlistalternative{\listparameter\c!alternative}%
+   \else
+     \let\currentlistalternative\m_strc_list_alternative
+   \fi
+   \directsetup{\listalternativeparameter\c!renderingsetup}\relax
+   \endgroup
+   % till here, where we reset locals
+   \the\t_lists_every_renderingcleanup}
+
+% todo: provide packager via attributes
+
+\doinstallinjector\s!list
+
+\installcorenamespace{listalternativemethods} % the general wrapper of a rendering
+
+\startsetups[\??listrenderings:none]
+    % nothing, nb we use the [] syntax here because we end with a \cs
+\stopsetups
+
+\permanent\protected\def\currentlistentrytitlesynchronize
+  {\the\t_lists_every_renderingsynchronize}
+
+\permanent\protected\def\currentlistentrytitlerendered
+  {\currentlistentrytitlesynchronize\currentlistentrytitle}
+
+\startsetups[\??listrenderings:command]
+    \edef\p_command{\listalternativeparameter\c!command}%
+    \ifempty\p_command
+        [\currentlist: \currentlistentrynumber\space -- \currentlistentrytitle\space -- \currentlistentrypagenumber]%
+    \else
+        \p_command
+          \currentlistentrynumber
+          \currentlistentrytitlerendered % {\currentlistentrytitlesynchronize\currentlistentrytitle}
+          \currentlistentrypagenumber
+    \fi
+\stopsetups
+
+% \startsetups[\??listrenderings:\v!vertical]
+%     \directsetup{\??listrenderings:generic}
+% \stopsetups
+
+% \startsetups[\??listrenderings:\v!horizontal]
+%     \directsetup{\??listrenderings:generic}
+% \stopsetups
+
+\startsetups[\??listrenderings:generic]
+    \typo_injectors_check_list
+    \listparameter\c!before % can be \hskip
+    \edef\p_command{\listalternativeparameter\c!command}
+    \ifempty\p_command
+        \listalternativeparameter\c!before
+        \vbox {
+            \forgetall
+            \noindent % otherwise annotations are mirrored up
+            \typo_injectors_mark_list
+            \hbox \strc_lists_get_reference_attribute\v!all {
+                \ifconditional\c_lists_show_number
+                  % \ifconditional\c_lists_has_page
+                        \hbox \strc_lists_get_reference_attribute\v!number {
+                            \strc_lists_set_style_color\c!numberstyle\c!numbercolor\v!number
+                            \listparameter\c!numbercommand\currentlistsymbol
+                        }
+                  % \fi
+                \fi
+                \hbox \strc_lists_get_reference_attribute\v!text {
+                    \strc_lists_set_style_color\c!textstyle\c!textcolor\v!text
+                    \the\t_lists_every_renderingtext
+                    \the\t_lists_every_renderingsynchronize
+                    \listparameter\c!textcommand\currentlistentrytitle
+                }
+                \ifconditional\c_lists_show_page
+                    \ifconditional\c_lists_has_page
+                        \hbox \strc_lists_get_reference_attribute\v!pagenumber {
+                            \strc_lists_set_style_color\c!pagestyle\c!pagecolor\v!pagenumber
+                            \listparameter\c!pagecommand\currentlistentrypagenumber
+                        }
+                    \fi
+                \fi
+            }
+        }
+        \listalternativeparameter\c!after
+   \else
+        \noindent % otherwise annotations are mirrored up
+        \typo_injectors_mark_list
+        \hbox \strc_lists_get_reference_attribute\v!all \strc_lists_get_destination_attribute {
+            \p_command\currentlistentrynumber\currentlistentrytitle\currentlistentrypagenumber
+        }
+   \fi
+   \listparameter\c!after
+\stopsetups
+
+% to be documented: align, hang
+
+\startsetups[\??listrenderings:abc]
+    \endgraf % are we grouped?
+    \typo_injectors_check_list
+  % \advance % yes or no ... \rightskip is also honored
+    \leftskip\listparameter\c!margin % after \endgraf !
+    \listparameter\c!before
+    \endgraf
+    \edef\p_width{\listparameter\c!width}
+    \scratchdistance\listparameter\c!distance\relax
+    \ifx\p_width\v!fit
+        \scratchwidth\zeropoint
+    \orelse\ifconditional\c_lists_has_number
+        \scratchwidth\p_width
+    \else
+        \edef\p_aligntitle{\listparameter\c!aligntitle}
+        \ifx\p_aligntitle\v!yes
+            \scratchwidth\zeropoint
+            \scratchdistance\zeropoint
+        \else
+            \scratchwidth\p_width
+        \fi
+    \fi
+    \noindent % otherwise annotations are mirrored up
+    \typo_injectors_mark_list
+    \hbox \strc_lists_get_reference_attribute\v!all \strc_lists_get_destination_attribute {
+        \setlocalhsize
+        \hsize\localhsize
+        \hbox to \hsize {
+            \forgetall
+            \strc_lists_set_style_color\c!style\c!color\v!all
+            \scratchhsize\hsize
+            \ifconditional\c_lists_has_number
+                \ifconditional\c_lists_show_number
+                  \setbox\b_strc_lists_number
+%                    \hbox
+%                      \strc_lists_get_reference_attribute\v!number
+%                      \ifdim\scratchwidth>\zeropoint to \scratchwidth \fi
+                    \simplealignedboxplus
+                        \scratchwidth
+                        {\listparameter\c!numberalign}
+                        {\strc_lists_get_reference_attribute\v!number}
+                        {
+                            \strc_lists_set_style_color\c!numberstyle\c!numbercolor\v!number
+                            \listparameter\c!numbercommand\currentlistsymbol
+%                             \hfill
+                        }
+                \else
+                    \setbox\b_strc_lists_number\emptyhbox
+                \fi
+            \else
+                \scratchwidth\zeropoint
+                \scratchdistance\zeropoint
+                \setbox\b_strc_lists_number\emptyhbox
+            \fi
+            \ifconditional\c_lists_has_page
+                \ifconditional\c_lists_show_page
+                    \setbox\b_strc_lists_page\hpack {
+                        \scratchdimen\listalternativeparameter\c!width
+                        \hbox \strc_lists_get_reference_attribute\v!pagenumber \ifdim\scratchdimen>\zeropoint to \scratchdimen\fi {
+                            \hfill
+                            \strc_lists_set_style_color\c!pagestyle\c!pagecolor\v!pagenumber
+                            \strut
+                            \listparameter\c!pagecommand\currentlistentrypagenumber
+                        }
+                    }
+                \else
+                    \setbox\b_strc_lists_page\emptyhbox
+                \fi
+            \else
+                \setbox\b_strc_lists_page\emptyhbox
+            \fi
+            \vbox {
+                \hsize\scratchhsize
+                \usealignparameter\listparameter
+                \ifdim\scratchwidth<\hsize
+                    % we have leftskip so we'd better just skip back instead of messing
+                    % with hang*
+                    \edef\p_hang{\listparameter\c!hang}
+                    \hangindent\dimexpr\wd\b_strc_lists_number+\scratchdistance\relax
+                    \hangafter\ifx\p_hang\v!no\zerocount\else\plusone\fi
+                    \scratchdimen\listalternativeparameter\c!distance\relax
+                    \ifzeropt\wd\b_strc_lists_page \else \ifdim\scratchdimen>\zeropoint\relax
+                        \rightskip\scratchdimen\s!plus\listalternativeparameter\c!stretch\relax
+                        \parfillskip-\rightskip
+                    \fi \fi
+                \else
+                    \scratchdistance\zeropoint
+                \fi
+                \parindent\zeropoint
+                \dontleavehmode % this nils hang: i need to figure out why
+                % % topaligned
+                %
+                % \scratchdimen\wd\b_strc_lists_number
+                % \setbox\b_strc_lists_number\hbox to \hsize{\box\b_strc_lists_number\hss\box\b_strc_lists_page}%
+                % \wd\b_strc_lists_number\scratchdimen
+                %
+                \box\b_strc_lists_number
+                \hskip\scratchdistance\relax
+                \begingroup
+                \strc_lists_set_reference_attribute\v!text
+                \strc_lists_set_style_color\c!textstyle\c!textcolor\v!text
+                \the\t_lists_every_renderingtext
+                \the\t_lists_every_renderingsynchronize
+                \setstrut % needs checking, new here
+                \begstrut
+                \strc_lists_limitated_text\currentlistentrytitle
+                \endstrut
+                \endgroup
+                \ifzeropt\wd\b_strc_lists_page\else
+                    \nobreak
+                    \currentlistfiller
+                    \box\b_strc_lists_page
+                \fi
+            }
+            \hss
+        }
+    }% new
+    \endgraf % new, else problems with nointerlinespace and prevdepth
+    \nointerlineskip % anders verkeerde spatiering bij multi-line
+    \endgraf
+    \allowbreak
+    \listparameter\c!after
+\stopsetups
+
+% % example from the context list
+%
+% \setuphead [part]    [page=right,placehead=yes]
+% \setuplist [chapter] [alternative=d,before=\blank,after=\blank]
+% \setuplist [part]    [before=\blank,after=\blank]
+%
+% \starttext
+%   \startnarrower[2*right] \placecontent \stopnarrower
+%   \blank[4*big]
+%   \startsetups chapter
+%     \blank \startnarrower[3*middle] \placecontent[criterium=local] \stopnarrower
+%   \stopsetups
+%   \placelist[part][criterium=text,after=\setups{chapter}]
+%
+%   \part{First part}       \chapter{Chapter one}  \chapter{Chapter two}
+%   \chapter{Chapter three} \chapter{Chapter four} \chapter{Chapter five}
+%   \part{Second part}      \chapter{Chapter one}  \chapter{Chapter two}
+%   \chapter{Chapter three} \chapter{Chapter four} \chapter{Chapter five}
+%   \part{Third part}       \chapter{Chapter one}  \chapter{Chapter two}
+%   \chapter{Chapter three} \chapter{Chapter four} \chapter{Chapter five}
+% \stoptext
+
+\startsetups[\??listrenderings:d]
+    \ifvmode
+        \advance\leftskip\listparameter\c!margin
+    \fi
+    \begingroup
+    \ifvmode
+        \noindent
+    \fi
+    \begingroup
+    \strc_lists_set_reference_attribute\v!all
+    \strc_lists_set_style_color\c!style\c!color\v!all
+    \strc_lists_get_destination_attribute
+    \begingroup
+    \ifconditional\c_lists_show_number
+        \donetrue
+        \ifconditional\c_lists_has_number \else
+            \edef\p_symbol{\listparameter\c!symbol}
+            \ifempty\p_symbol
+                \donefalse
+            \fi
+        \fi
+        \ifdone
+            \begingroup
+            \strc_lists_set_reference_attribute\v!number
+            \strc_lists_set_style_color\c!numberstyle\c!numbercolor\v!number
+            \listparameter\c!left
+            \listparameter\c!numbercommand\currentlistsymbol
+            \listparameter\c!right
+            \endgroup
+            \kern.5\emwidth\relax
+            \nobreak
+        \fi
+    \fi
+    \endgroup
+    \begingroup
+    \strc_lists_set_reference_attribute\v!text
+    \strc_lists_set_style_color\c!textstyle\c!textcolor\v!text
+    \the\t_lists_every_renderingtext
+    \the\t_lists_every_renderingsynchronize
+    \setstrut % needs checking, new here
+    \begstrut
+    \strc_lists_limitated_text\currentlistentrytitle
+    \endstrut
+    \endgroup
+    \begingroup
+    \ifconditional\c_lists_has_page
+        \ifconditional\c_lists_show_page
+            \nobreak
+            \hskip.75\emwidth\relax
+            \nobreak
+            \strc_lists_set_reference_attribute\v!pagenumber
+            \strc_lists_set_style_color\c!pagestyle\c!pagecolor\v!pagenumber
+            \strut
+            \listparameter\c!pagecommand\currentlistentrypagenumber
+        \fi
+    \fi
+    \endgroup
+    \scratchdistance\listparameter\c!distance\relax
+    \ifdim\scratchdistance<\emwidth
+        \hskip\emwidth\s!plus\emwidth\s!minus.25\emwidth\relax
+    \else
+        \hskip\scratchdistance\s!plus.5\scratchdistance\s!minus.25\scratchdistance\relax
+    \fi
+    \endgroup
+    \endgroup
+\stopsetups
+
+\startsetups[\??listrenderings:e]
+    \typo_injectors_check_list
+    \noindent % otherwise annotations are mirrored up
+    \typo_injectors_mark_list
+    \hbox \strc_lists_get_reference_attribute\v!all \strc_lists_get_destination_attribute {
+        \letlistparameter\c!depth\zeropoint
+        \letlistparameter\c!color\empty
+        \inheritedlistframed {
+            \letinteractionparameter\c!strut\v!no % still needed?
+            \strc_lists_set_style_color\c!style\c!color\v!all
+            \the\t_lists_every_renderingtext
+            \the\t_lists_every_renderingsynchronize
+            \setstrut
+            \begstrut
+            \strc_lists_limitated_text\currentlistentrytitle
+            \endstrut
+        }
+    }
+    \par
+    \listparameter\c!inbetween
+\stopsetups
+
+\startsetups[\??listrenderings:f]
+    \typo_injectors_check_list
+    \noindent % otherwise annotations are mirrored up
+    \typo_injectors_mark_list
+    \hbox \strc_lists_get_reference_attribute\v!all \strc_lists_get_destination_attribute {
+        \dosetraggedhbox{\listparameter\c!align}%
+        \raggedbox {
+            \strc_lists_set_style_color\c!style\c!color\v!all
+            \the\t_lists_every_renderingtext
+            \the\t_lists_every_renderingsynchronize
+            \setstrut
+            \begstrut
+            \strc_lists_limitated_text\currentlistentrytitle
+            \endstrut
+        }
+    }
+    \par
+    \listparameter\c!inbetween
+\stopsetups
+
+\startsetups[\??listrenderings:g]
+    \typo_injectors_check_list
+    \noindent % otherwise annotations are mirrored up
+    \typo_injectors_mark_list
+    \hbox \strc_lists_get_reference_attribute\v!all \strc_lists_get_destination_attribute {
+        \midaligned {
+            \strc_lists_set_style_color\c!style\c!color\v!all
+            \the\t_lists_every_renderingtext
+            \the\t_lists_every_renderingsynchronize
+            \setstrut
+            \begstrut
+            \strc_lists_limitated_text\currentlistentrytitle
+            \endstrut
+        }
+    }
+    \par
+    \listparameter\c!inbetween
+\stopsetups
+
+%D This is a new one, similar to vertical and horizontal but better suited when
+%D no command is set (WS):
+
+\definelistalternative
+  [\v!interactive]
+  [\c!renderingsetup=\??listrenderings:interactive,
+   \c!before=\endgraf, % new per 2014-11-08
+   \c!after=\endgraf]  % new per 2014-11-08
+
+\startsetups[\??listrenderings:interactive]
+    \edef\p_command{\listalternativeparameter\c!command}%
+    \typo_injectors_check_list
+    \listparameter\c!before
+    \noindent % otherwise annotations are mirrored up
+    \typo_injectors_mark_list
+    \hbox \strc_lists_get_reference_attribute\v!all \strc_lists_get_destination_attribute {
+        \ifempty\p_command
+            [
+                \currentlist:\space
+                \currentlistentrynumber
+                \space\emdash\space
+                \currentlistentrytitle
+                \space\emdash\space
+                \currentlistentrypagenumber
+            ]
+        \else
+            \p_command\currentlistentrynumber\currentlistentrytitle\currentlistentrypagenumber
+        \fi
+   }
+   \listparameter\c!after
+\stopsetups
+
+%D One special for publications (as Alan loves to hangindent). No fonts and such
+%D (for now). No interaction either as that is dealt with elsewhere.
+%D
+%D \currentlistsymbol
+%D \currentlistentrynumber
+%D \currentlistentrytitle
+%D \currentlistentrypagenumber % not really used
+
+\definelistalternative
+  [\v!paragraph]
+  [\c!filler=\v!space,
+   \c!renderingsetup=\??listrenderings:\v!paragraph]
+
+\startsetups[\??listrenderings:\v!paragraph]
+    \endgraf % are we grouped?
+    \typo_injectors_check_list % ?
+    \listparameter\c!before
+    \endgraf
+    \begingroup
+    \forgetall
+    \noindent
+    \parindent\zeropoint
+    \edef\p_width{\listparameter\c!width}%
+    \edef\p_distance{\listparameter\c!distance}% we are nice for bib users
+    \edef\p_margin{\listparameter\c!margin}% we are nice for bib users
+    \ifx\p_distance\v!none
+        \scratchdistance\zeropoint
+    \else
+        \scratchdistance\p_distance
+    \fi
+    \ifx\p_margin\v!none
+        \scratchoffset\zeropoint
+    \else
+        \scratchoffset\p_margin
+    \fi
+    \ifx\p_width\v!fit
+        \scratchwidth\zeropoint
+        \leftskip\scratchoffset
+    \else
+        \scratchwidth\p_width
+        \ifzeropt\scratchoffset
+            \leftskip\dimexpr\scratchwidth+\scratchdistance\relax
+        \else
+            \leftskip\scratchoffset
+        \fi
+    \fi
+    \usealignparameter\listparameter
+    \hskip-\leftskip
+    \ifconditional\c_lists_has_number
+        \ifconditional\c_lists_show_number
+            \setbox\scratchbox
+                \simplealignedbox\scratchwidth{\listparameter\c!numberalign}
+                \bgroup
+                    \useliststyleandcolor\c!numberstyle\c!numbercolor
+                    \currentlistsymbol
+                \egroup
+            \ifdim\wd\scratchbox>\zeropoint
+                \box\scratchbox
+                \hskip\scratchdistance\relax
+            \fi
+        \fi
+    \fi
+    \begingroup
+        \useliststyleandcolor\c!textstyle\c!textcolor
+        \setstrut
+        \begstrut
+        \currentlistentrytitle
+        \endstrut
+    \endgroup
+    \ifconditional\c_lists_has_page
+        \ifconditional\c_lists_show_page
+            \nobreak
+            \currentlistfiller
+            \begingroup
+                \useliststyleandcolor\c!pagestyle\c!pagecolor
+                \currentlistentrypagenumber
+            \endgroup
+        \fi
+    \fi
+    \endgraf
+    \endgroup
+    \allowbreak
+    \listparameter\c!after
+\stopsetups
+
+%D List elements are packaged in such a way that we can click on them in an
+%D interactive document. Here are a few helpers.
+
+\newconstant\a_strc_lists_reference
+\newconstant\a_strc_lists_destination
+
+\installcorenamespace{listinteractions}
+
+\letvalue{\??listinteractions\v!number       }\v!number
+\letvalue{\??listinteractions\v!sectionnumber}\v!number
+\letvalue{\??listinteractions\v!text         }\v!text
+\letvalue{\??listinteractions\v!title        }\v!text
+\letvalue{\??listinteractions\v!page         }\v!pagenumber
+\letvalue{\??listinteractions\v!pagenumber   }\v!pagenumber
+\letvalue{\??listinteractions\v!all          }\v!all
+\letvalue{\??listinteractions\v!yes          }\v!all
+
+\permanent\def\listboxproperties       {\strc_lists_get_reference_attribute}
+\permanent\def\listrenderingsetup      {\the\t_lists_every_renderingtext}
+\permanent\def\listrenderingsynchronize{\the\t_lists_every_renderingsynchronize}
+
+\protected\def\strc_lists_interaction_check
+  {\iflocation
+     \strc_lists_interaction_check_yes
+   \else
+     \strc_lists_interaction_check_nop
+   \fi}
+
+\def\strc_lists_interaction_check_yes_yes
+  {\edef\p_interaction_forward{\listparameter\c!interaction}%
+   \ifcsname\??listinteractions\p_interaction_forward\endcsname
+    %\expandafter\let\expandafter\p_interaction_forward\csname\??listinteractions\p_interaction_forward\endcsname
+     \expandafter\let\expandafter\p_interaction_forward\lastnamedcs
+     \strc_references_get_simple_reference{internal(\currentlistentrylocation)}%
+     \a_strc_lists_reference\currentreferenceattribute
+   \else
+     \a_strc_lists_reference\attributeunsetvalue
+   \fi
+   \ifnum\a_strc_lists_reference=\attributeunsetvalue
+     \let\strc_lists_get_reference_attribute\gobbleoneargument
+     \let\strc_lists_set_reference_attribute\gobbleoneargument
+     \let\strc_lists_set_style_color        \strc_lists_set_style_color_normal
+   \else
+     \let\strc_lists_get_reference_attribute\strc_lists_get_reference_attribute_indeed
+     \let\strc_lists_set_reference_attribute\strc_lists_set_reference_attribute_indeed
+     \let\strc_lists_set_style_color        \strc_lists_set_style_color_special
+   \fi
+   \edef\p_interaction_backward{\namedheadparameter\currentlist\c!interaction}% \namedheadparameter !
+   \ifx\p_interaction_backward\v!list
+     \strc_references_set_simple_reference{*\currentlistentrylocation}%
+     \a_strc_lists_destination\currentdestinationattribute
+   \else
+     \a_strc_lists_destination\attributeunsetvalue
+   \fi
+   \ifnum\a_strc_lists_destination=\attributeunsetvalue
+     \let\strc_lists_get_destination_attribute\empty
+     \let\strc_lists_set_destination_attribute\empty
+   \else
+     \let\strc_lists_get_destination_attribute\strc_lists_get_destination_attribute_indeed
+     \let\strc_lists_set_destination_attribute\strc_lists_set_destination_attribute_indeed
+   \fi}
+
+\def\strc_lists_interaction_check_yes_nop
+  {\a_strc_lists_reference  \attributeunsetvalue
+   \a_strc_lists_destination\attributeunsetvalue
+   \let\strc_lists_get_reference_attribute\gobbleoneargument
+   \let\strc_lists_set_reference_attribute\gobbleoneargument
+   \let\strc_lists_get_destination_attribute\empty
+   \let\strc_lists_set_destination_attribute\empty
+   \let\strc_lists_set_style_color\strc_lists_set_style_color_normal}
+
+\def\strc_lists_interaction_check_yes
+  {\ifempty\currentlistentrylocation
+     \strc_lists_interaction_check_yes_nop
+   \orelse\ifnum\currentlistentrylocation=\zerocount
+     \strc_lists_interaction_check_yes_nop
+   \else
+     \strc_lists_interaction_check_yes_yes
+   \fi}
+
+\def\strc_lists_interaction_check_nop
+  {\let\strc_lists_get_reference_attribute  \gobbleoneargument
+   \let\strc_lists_set_reference_attribute  \gobbleoneargument
+   \let\strc_lists_get_destination_attribute\empty
+   \let\strc_lists_set_destination_attribute\empty
+   \let\strc_lists_set_style_color          \strc_lists_set_style_color_normal}
+
+\strc_lists_interaction_check_nop
+
+\def\strc_lists_get_reference_attribute_indeed#element%
+  {\ifx#element\p_interaction_forward
+     attr \referenceattribute\a_strc_lists_reference
+   \fi}
+
+\def\strc_lists_set_reference_attribute_indeed#element%
+  {\ifx#element\p_interaction_forward
+     \c_attr_reference\a_strc_lists_reference
+   \fi}
+
+\def\strc_lists_get_destination_attribute_indeed
+  {attr \destinationattribute\number\a_strc_lists_destination}
+
+\def\strc_lists_set_destination_attribute_indeed
+  {\c_attr_destination\a_strc_lists_destination}
+
+\protected\def\strc_lists_set_style_color_normal#style#color#element%
+  {\useliststyleandcolor#style#color}
+
+\protected\def\strc_lists_set_style_color_special#style#color#element%
+  {\useliststyleandcolor#style#color%
+   \ifempty\currentcolorparameter
+     \ifx#element\p_interaction_forward
+       \setlocationcolor
+     \fi
+ % \else
+ %   \resetinteractionparameter\c!color
+ %   \resetinteractionparameter\c!contrastcolor
+   \fi}
+
+\let\strc_lists_set_style_color\strc_lists_set_style_color_normal
+
+%D A helper:
+
+\def\strc_lists_limitated_text#text%
+  {\edef\p_maxwidth{\listparameter\c!maxwidth}%
+   \ifempty\p_maxwidth
+     \listparameter\c!textcommand{#text}%
+   \else
+     \listparameter\c!textcommand{\limitatetext{#text}\p_maxwidth{\splitsymbol{\listparameter\c!limittext}}}%
+   \fi}
+
+% public helpers
+
+\permanent\protected\def\startcurrentlistentrywrapper
+  {\hbox \strc_lists_get_reference_attribute\v!all \strc_lists_get_destination_attribute\bgroup}
+
+\aliased\let\stopcurrentlistentrywrapper\egroup
+
+\aliased\let\currentlistentryreferenceattribute  \strc_lists_get_reference_attribute
+\aliased\let\currentlistentrydestinationattribute\strc_lists_get_destination_attribute
+\aliased\let\currentlistentrylimitedtext         \strc_lists_limitated_text
+
+% todo:
+
+\def\utilitylistlength{\listlength} % old name ... uses in styles
+
+\mutable\let\listlength\!!zerocount % better use listmode
+
+\permanent\tolerant\protected\def\determinelistcharacteristics[#list]#spacer[#settings]%
+  {\begingroup
+   \edef\currentlist{\firststructureelementinlist{#list}}%
+   \ifempty\currentlist
+     \endgroup
+     \let\listlength\!!zerocount
+   \else
+     \setupcurrentlist[#settings]%
+     \strc_lists_analyze{#list}{\listparameter\c!criterium}{\listparameter\c!reference}%
+     \normalexpanded{\endgroup\noexpand\edef\noexpand\listlength{\structurelistsize}}%
+   \fi
+   \strc_lists_set_mode}
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/strc-mat.mkxl b/tex/context/base/mkiv/strc-mat.mkxl
new file mode 100644
index 000000000..e72be7d3e
--- /dev/null
+++ b/tex/context/base/mkiv/strc-mat.mkxl
@@ -0,0 +1,1308 @@
+%D \module
+%D   [       file=strc-mat,
+%D        version=2008.10.20,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Math Numbering,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Structure Macros / Math Numbering}
+
+\registerctxluafile{strc-mat}{}
+
+% -- we have potential for captions
+% -- this module will use the commandhandler
+% -- key/value pairs will be added (I have no time now)
+
+\unprotect
+
+\setupformulas
+  [%\c!way=,
+   %\c!blockway=,
+   %\c!sectionnumber=,
+   %\c!conversion=\v!numbers,
+   %\c!numberstyle=,
+   %\c!numbercolor=,
+   %\c!numbercommand=,
+   %\c!margin=,
+   %\c!align=,
+   %\c!separator=,
+   \c!grid=\v!math,
+   \c!location=\v!right,
+   \c!left=(,
+   \c!right=),
+   \c!expansion=\v!yes, % maybe automatically
+   \c!spacebefore=\v!big,
+   \c!spaceafter=\formulaparameter\c!spacebefore,
+   \c!width=\hsize,
+   \c!leftmargin=\zeropoint,
+   \c!rightmargin=\zeropoint,
+   \c!indentnext=\v!no,
+   \c!alternative=\s!default,
+   \c!strut=\v!no,
+   \c!numberstrut=\v!yes, % \v!no \v!yes \v!always
+   \c!distance=2\emwidth]
+
+\setupformulaframed
+  [%c!location=<auto set>,
+   %c!width=<auto set>,
+   %c!align=<auto set>,
+   \c!offset=.5\exheight]
+
+\ifdefined\matheqnogapstep
+    % we're ok, now we have that quad in the distance which is
+    % more consistent and not depending on the text font in math
+    \matheqnogapstep\zerocount
+\else
+    % we will keep this for a while
+    \setupformulas[\c!distance=\emwidth]
+\fi
+
+% \ifdefined\mathdisplayskipmode
+%     \mathdisplayskipmode\plustwo % only when not zero / needs adapted space handler
+% \fi
+
+% \mathdisplayskipmode\plusthree
+%
+% \hbox\bgroup
+%     \setbox0\vbox\bgroup
+%         xxxxxxxxx\par
+%         \vskip-\baselineskip
+%         $$a^2_2$$\par
+%         xxxxxxxxx\par
+%     \egroup
+%     \box0
+%     \vbox\bgroup
+%         xxxxxxxxx\par
+%         \vskip-\baselineskip
+%         $$a^2$$\par
+%         xxxxxxxxx\par
+%     \egroup
+%     \vbox\bgroup
+%         xxxxxxxxx
+% \vskip-\baselineskip
+%         $$a_2$$
+%         xxxxxxxxx
+%     \egroup
+% \egroup
+%
+% \hbox\bgroup
+%     \setbox0\vbox\bgroup
+%         xxxxxxxxx\par
+%         \ctxlua{tex.prevdepth=-1000 *65536}
+%         $$a^2_2$$\par
+%         xxxxxxxxx\par
+%     \egroup
+%     \box0
+%     \vbox\bgroup
+%         xxxxxxxxx\par
+%         \ctxlua{tex.prevdepth=-1000 *65536}
+%         $$a^2$$\par
+%         xxxxxxxxx\par
+%     \egroup
+%     \vbox\bgroup
+%         xxxxxxxxx
+%         \ctxlua{tex.prevdepth=-1000 *65536}
+%         $$a_2$$
+%         xxxxxxxxx
+%     \egroup
+% \egroup
+
+\setupsubformulas % subformulas could be last in chain
+  [\c!indentnext=\formulaparameter\c!indentnext]
+
+\definecounter % one ?
+  [\v!formula]
+
+\defineconversionset
+  [\v!formula]
+  [numbers,characters] % no \v! ?
+
+\installcounterassociation{formula} \registerformulacounter\v!formula % currently we only have one
+
+\appendtoks
+    \synchronizeformulacounters
+\to \everysetupformula
+
+% \appendtoks
+%     \synchronizeformulacounters
+% \to \everydefineformula
+
+\setupformulas
+  [\c!numberconversionset=\v!formula] % why forgotten
+
+\appendtoks
+    \normalexpanded{\definelist[\currentformula]}% is expansion needed?
+    \frozen\instance\setuevalue{\e!start\currentformula\v!formula}{\strc_formulas_start_formula{\currentformula}}%
+    \frozen\instance\setuevalue{\e!stop \currentformula\v!formula}{\strc_formulas_stop_formula}%
+\to \everydefineformula
+
+\definelist[\v!formula]
+
+\permanent\setuvalue{\e!start\v!formula}{\strc_formulas_start_formula{}}
+\permanent\setuvalue{\e!stop \v!formula}{\strc_formulas_stop_formula}
+
+\let\strc_formulas_start_formula\relax % defined later
+\let\strc_formulas_stop_formula \relax % defined later
+
+\permanent\tolerant\protected\def\defineformulaalternative[#1]#*[#2]#*[#3]%
+  {\setvalue{\e!start#1\v!formula}{#2}%
+   \setvalue{\e!stop #1\v!formula}{#3}}
+
+% sp = single line paragraph  sd = single line display
+% mp = multi  line paragraph  md = multy  line display
+
+\defineformulaalternative[\s!default][\startdisplaymath][\stopdisplaymath]
+\defineformulaalternative[\s!single] [\startdisplaymath][\stopdisplaymath]
+\defineformulaalternative[\s!multi]  [\startdisplaymath][\stopdisplaymath]
+
+\defineformula
+  [sp]
+  [\c!spacebefore=\v!none,
+   \c!spaceafter=\v!none,
+   \c!indentnext=\v!no,
+   \c!alternative=\s!single]
+
+\defineformula
+  [sd]
+  [\c!spacebefore=\v!none,
+   \c!spaceafter=\v!none,
+   \c!indentnext=\v!yes,
+   \c!alternative=\s!single]
+
+\defineformula
+  [mp]
+  [\c!indentnext=\v!no,
+   \c!alternative=\s!multi]
+
+\defineformula
+  [md]
+  [\c!indentnext=\v!yes,
+   \c!alternative=\s!multi]
+
+\newtoks\everyresetformulas
+
+\appendtoks
+    \let\currentformula\empty % to be checked:
+\to \everyresetformulas
+
+% implementation
+
+\protected\def\strc_formulas_store_number#1#2#3#4#5% ref, todo:str, \sync % todo: title etc (like float)
+  {\settrue\c_strc_formulas_handle_number
+   \strc_counters_register_component
+     {formula}%
+     \setupcurrentformula \formulaparameter \detokenizedformulaparameter
+     \relax \relax \relax
+     [\c!name=\v!formula,\s!counter=\v!formula,%
+      \s!hascaption=\v!yes,\s!hastitle=\v!yes,\s!hasnumber=\v!yes,%\s!haslevel=#6,%
+      \c!reference=#1,\c!title=\namedformulaentry,\c!bookmark=]%
+     [#2]%
+   \glet\namedformulaentry\empty % \relax
+   \glet#3\m_strc_counters_last_registered_index
+   \glet#4\m_strc_counters_last_registered_synchronize
+   \glet#5\m_strc_counters_last_registered_attribute}
+
+% modes: 0=unset, 1=forced, 2=none, 3=reference
+
+\newconstant\c_strc_formulas_place_number_mode
+\newconstant\c_strc_formulas_number_mode
+\newconstant\c_strc_formulas_sub_number_mode
+\newconstant\c_strc_formulas_nested_number_mode
+
+\appendtoks
+    \c_strc_formulas_place_number_mode \zerocount
+    \c_strc_formulas_number_mode       \zerocount
+    \c_strc_formulas_sub_number_mode   \zerocount
+    \c_strc_formulas_nested_number_mode\zerocount
+\to \everyresetformulas
+
+\newconditional\c_strc_formulas_handle_number
+\newconditional\c_strc_formulas_inside_place
+\newconditional\c_strc_formulas_inside_place_sub
+\newconditional\c_strc_formulas_inside_formulas
+\newconditional\c_strc_formulas_inside_formulas_sub
+
+\appendtoks
+    \global\setfalse\c_strc_formulas_inside_place
+    \global\setfalse\c_strc_formulas_inside_place_sub
+\to \everyresetformulas
+
+\def\strc_formulas_place_number_noneed
+  {\doif{\formulaparameter\c!numberstrut}\v!always\strut}
+
+\def\strc_formulas_place_numbering % place formula
+  {\settrue\c_strc_formulas_handle_number
+   \strc_formulas_check_reference\c_strc_formulas_place_number_mode\currentplaceformulareference
+   \ifnum\c_strc_formulas_place_number_mode=\plustwo
+     \glet\strc_formulas_place_number\strc_formulas_place_number_noneed
+   \else
+     \glet\strc_formulas_place_number\strc_formulas_place_number_indeed
+   \fi
+   \glet\strc_formulas_place_number_nested\strc_formulas_place_number_nested_indeed}
+
+\def\strc_formulas_handle_number % formulas
+  {\strc_formulas_check_reference\c_strc_formulas_number_mode\currentformulasreference}
+
+\def\strc_formulas_handle_sub_number_indeed % sub formulas
+  {\strc_formulas_check_reference\c_strc_formulas_sub_number_mode\currentsubformulasreference
+   \strc_counters_increment\v!formula
+   \strc_formulas_store_number
+     \currentsubformulasreference
+     \empty
+     \currentsubformulasnumber
+     \currentsubformulassynchronize
+     \currentsubformulasattribute}
+
+\def\strc_formulas_handle_sub_number % sub formulas
+  {\iftrialtypesetting
+     \strc_counters_save\v!formula
+     \strc_formulas_handle_sub_number_indeed
+     \strc_counters_restore\v!formula
+   \else
+     \strc_formulas_handle_sub_number_indeed
+   \fi}
+
+\let\strc_formulas_reference_trace\relax
+\let\strc_formulas_reference_show \relax
+
+\permanent\protected\def\placecurrentformulanumber
+  {\begingroup
+   \rm % determines the distance and main font
+   \edef\p_location{\formulaparameter\c!location}%
+   \ifx\p_location\v!right
+      \hskip\formulaparameter\c!distance
+   \fi
+   \begingroup
+   \useformulastyleandcolor\c!numberstyle\c!numbercolor
+   \formulaparameter\c!numbercommand
+     {\edef\p_strut{\formulaparameter\c!numberstrut}%
+      \ifx\p_strut\v!always
+         \strut
+      \orelse\ifx\p_strut\v!yes
+         \strut
+      \fi
+      \formulaparameter\c!left
+      \namedtaggedlabeltexts
+        \t!formulalabel \v!formula
+        \t!formulanumber\v!formula
+        {\ignorespaces\strc_formulas_place_current_number\removeunwantedspaces}%
+      \formulaparameter\c!right}%
+   \endgroup
+   \ifx\p_location\v!left
+     \hskip\formulaparameter\c!distance
+   \fi
+   \endgroup}
+
+\protected\def\strc_formulas_place_current_number
+  {\ifempty\namedformulaentry
+     \strc_formulas_handle_current_references
+     \labeltexts\currentformula{\convertedcounter[\v!formula][]}%
+   \else
+     \expandafter % hm, the next one reset \namedformulaentry
+     \strc_formulas_handle_current_references
+     \namedformulaentry
+   \fi}
+
+\permanent\def\theformuladestinationattribute#1%
+  {\iflocation\ifx#1\relax\orelse\ifempty#1\else
+     \c_attr_destination#1%
+     \glet#1\relax
+   \fi\fi}
+
+\let\currentplaceformulaattribute\relax
+\let\currentformulaattribute     \relax
+\let\currentsubformulaattribute  \relax
+\let\currentformulasattribute    \relax
+
+\let\currentplaceformulanumber\relax
+\let\currentformulanumber     \relax
+\let\currentsubformulanumber  \relax
+\let\currentformulasnumber    \relax
+
+\mutable\let\currentformulasreference     \empty
+\mutable\let\currentformulareference      \empty
+\mutable\let\currentsubformulareference   \empty
+\mutable\let\currentnestedformulareference\empty
+
+\appendtoks
+    \glet\currentformulasreference     \empty
+    \glet\currentformulareference      \empty
+    \glet\currentsubformulareference   \empty
+    \glet\currentnestedformulareference\empty
+\to \everyresetformulas
+
+\mutable\let\currentformulassuffix     \empty
+\mutable\let\currentformulasuffix      \empty
+\mutable\let\currentsubformulasuffix   \empty
+\mutable\let\currentnestedformulasuffix\empty
+
+\appendtoks
+    \glet\currentformulassuffix     \empty
+    \glet\currentformulasuffix      \empty
+    \glet\currentsubformulasuffix   \empty
+    \glet\currentnestedformulasuffix\empty
+\to \everyresetformulas
+
+\let\currentplaceformulasynchronize\relax
+\let\currentformulasynchronize     \relax
+\let\currentsubformulasynchronize  \relax
+\let\currentformulassynchronize    \relax
+
+\appendtoks
+    \glet\currentplaceformulasynchronize \relax
+    \glet\currentformulassynchronize     \relax
+    \glet\currentsubformulassynchronize  \relax
+    \glet\currentnestedformulasynchronize\relax
+\to \everyresetformulas
+
+% currently we do the number, some day we will do the (sub) formula
+
+\def\strc_formulas_handle_current_references
+  {\strc_formulas_reference_show
+   \ifnum\c_strc_formulas_place_number_mode=\plusthree
+     \strc_formulas_store_number
+       \currentplaceformulareference
+       \empty
+       \currentplaceformulanumber
+       \currentplaceformulasynchronize
+       \currentplaceformulaattribute
+     \currentplaceformulasynchronize
+     \glet\currentplaceformulasynchronize\relax
+     \theformuladestinationattribute\currentplaceformulaattribute
+   \fi
+   \ifnum\c_strc_formulas_number_mode=\plusthree
+     \strc_formulas_store_number
+       \currentformulasreference
+       \empty
+       \currentformulasnumber
+       \currentformulassynchronize
+       \currentformulasattribute
+     \currentformulassynchronize
+     \glet\currentformulassynchronize\relax
+     \theformuladestinationattribute\currentformulasattribute
+   \fi
+   \ifnum\c_strc_formulas_sub_number_mode=\plusthree
+     \currentsubformulassynchronize
+     \glet\currentsubformulassynchronize\relax
+   \fi
+   \ifnum\c_strc_formulas_nested_number_mode=\plusthree
+     \strc_formulas_store_number
+       \currentnestedformulareference
+       \empty
+       \currentnestedformulanumber
+       \currentnestedformulasynchronize
+       \currentnestedformulaattribute
+     \currentnestedformulasynchronize
+     \glet\currentnestedformulasynchronize\relax
+     \theformuladestinationattribute\currentnestedformulaattribute
+   \fi}
+
+% needs checking ... too many:
+
+\def\strc_formulas_handle_numbering_indeed
+  {\ifempty\namedformulaentry
+     \strc_counters_increment\v!formula
+     \doiftext\currentplaceformulasuffix{\strc_counters_setown_sub\v!formula\plustwo\currentplaceformulasuffix}%
+   \fi
+   \placecurrentformulanumber}
+
+\def\strc_formulas_handle_numbering
+  {\iftrialtypesetting
+     \strc_counters_save\v!formula
+     \strc_formulas_handle_numbering_indeed
+     \strc_counters_restore\v!formula
+   \else
+     \strc_formulas_handle_numbering_indeed
+   \fi}
+
+\def\strc_formulas_handle_sub_numbering_indeed
+  {\let\strc_formulas_handle_sub_numbering\relax % else error: see math/numbering-001.tex
+   \doifelsetext\currentsubformulasuffix
+     {\strc_counters_setown_sub\v!formula\plustwo\currentsubformulasuffix}
+     {\strc_counters_increment_sub\v!formula\plustwo}%
+   \placecurrentformulanumber}
+
+\def\strc_formulas_handle_sub_numbering
+  {\iftrialtypesetting
+     \strc_counters_save\v!formula
+     \strc_formulas_handle_sub_numbering_indeed
+     \strc_counters_restore\v!formula
+   \else
+     \strc_formulas_handle_sub_numbering_indeed
+   \fi}
+
+\def\strc_formulas_number_indeed
+  {\ifconditional\c_strc_formulas_handle_number
+     \hbox\bgroup
+       % main counter
+       \ifconditional\c_strc_formulas_inside_formulas_sub
+         % nothing
+       \else
+         \ifcase\c_strc_formulas_number_mode
+           \ifcase\c_strc_formulas_place_number_mode
+             \strc_formulas_handle_numbering
+           \or
+             \strc_formulas_handle_numbering
+           \or
+             % nothing
+           \or
+             \strc_formulas_handle_numbering
+           \fi
+         \or
+           \strc_formulas_handle_numbering
+         \or
+           % nothing
+         \or
+           \strc_formulas_handle_numbering
+         \fi
+       \fi
+       % subcounter
+       \ifconditional\c_strc_formulas_inside_formulas_sub
+         \ifcase\c_strc_formulas_sub_number_mode
+           \strc_formulas_handle_sub_numbering % was nothing
+         \or
+           \strc_formulas_handle_sub_numbering
+         \or
+           % nothing
+         \or
+           \strc_formulas_handle_sub_numbering
+         \fi
+       \fi
+       \strc_formulas_reference_trace
+     \egroup
+   \fi}
+
+\installstructurelistprocessor\v!formula % to be checked ...
+  {\let\currentlistentrynumber    \structurelistgenericnumber
+   \let\currentlistentrytitle     \structurelistgenerictitle
+   \let\currentlistentrypagenumber\structurelistpagenumber
+   \strc_lists_apply_renderingsetup}
+
+\newif\ifinformula
+
+%D We need a hook into the plain math alignment macros
+%D
+%D \starttyping
+%D \displaylines
+%D \eqalignno
+%D \eqalignno
+%D \stoptyping
+%D
+%D Otherwise we get a missing \type {$$} error reported.
+
+\pushoverloadmode
+
+\let\reqno\eqno % no longer valid as we just nil it
+
+\let\math_native_leqno\leqno
+\let\math_native_reqno\reqno
+
+\protected\def\normaleqno#1{\writestatus\m!system{no native (l)eqno equation number support}}
+
+\let\normalleqno\normaleqno
+\let\normalreqno\normaleqno
+
+\let\leqno\normaleqno
+\let\reqno\normaleqno
+\let\eqno \normaleqno
+
+\popoverloadmode
+
+%D \macros
+%D   {startsubformulas}
+
+% \placeformula
+% \startsubformulas[Maxwell]
+%     \startformulas
+%      \startformula \startalign
+%        \NC \nabla\cdot\bf E  \NC = \frac{\rho}{\varepsilon_0} \NR[Maxwell 1]
+%        \NC \nabla\times\bf E \NC = - \frac{\partial\bf B}{\partial t} \NR[Maxwell II]
+%        \stopalign \stopformula
+%        \startformula \startalign
+%          \NC \nabla\cdot \bf B \NC = 0 \NR[Maxwell III]
+%          \NC \nabla\times\bf B \NC = \mu_0{\bf j}+\varepsilon_0\mu_0\frac{\partial\bf E}{\partial t} \NR[Maxwell IV]
+%        \stopalign \stopformula
+%    \stopformulas
+% \stopsubformulas
+%
+% Maxwell : \in [Maxwell] and II : \in [Maxwell II]
+
+%D Tricky stuff:
+
+\abovedisplayskip      \zeropoint
+\abovedisplayshortskip \zeropoint % evt. 0pt minus 3pt
+\belowdisplayskip      \zeropoint
+\belowdisplayshortskip \zeropoint % evt. 0pt minus 3pt
+
+\predisplaypenalty     \zerocount
+\postdisplaypenalty    \zerocount % -5000 goes wrong, see penalty at \section
+\mathdisplayskipmode   \plusthree %  because align also adds
+
+% \predisplaygapfactor \zerocount % default is 2000
+
+\protected\def\strc_formulas_forget_display_skips
+  {\mathdisplayskipmode  \plusthree
+   \abovedisplayskip     \zeropoint
+   \belowdisplayskip     \zeropoint
+   \abovedisplayshortskip\zeropoint
+   \belowdisplayshortskip\zeropoint}
+
+\newdimen\d_strc_formulas_display_skip_left
+\newdimen\d_strc_formulas_display_skip_right
+\newdimen\d_strc_formulas_display_margin_left
+\newdimen\d_strc_formulas_display_margin_right
+\newdimen\d_strc_formulas_display_pre_threshold
+\newdimen\d_strc_formulas_display_width
+
+\newconstant\c_strc_formulas_mode      % this will go away
+\newconstant\c_strc_formulas_space_model
+
+\newconstant\c_strc_math_vertical % experiment
+
+\c_strc_formulas_mode       \plustwo   % 0=native 1=simple (old) 2=align (new)
+\c_strc_formulas_space_model\plusthree % replaces \plusone, we might use \plusfour in the future
+
+\newconditional\c_strc_formulas_tight
+
+\newbox\b_strc_formulas_number
+\newbox\b_strc_formulas_content
+
+\def\strc_formulas_flush_content_and_number
+  {\noindentation
+ % \dontleavehmode
+   \kern\d_strc_formulas_display_margin_left
+   \ifcase\wd\b_strc_formulas_number
+     \hbox to \displaywidth \bgroup
+        \hfill
+        \box\b_strc_formulas_content
+        \hfill
+     \egroup
+  \orelse\ifdim\dimexpr\wd\b_strc_formulas_content+\wd\b_strc_formulas_number\relax>\displaywidth
+    \vbox \bgroup
+      \hsize\displaywidth
+      \box\b_strc_formulas_content
+      \par
+      \ifx\p_location\v!left
+        \box\b_strc_formulas_number\hfill
+      \else
+        \hfill\box\b_strc_formulas_number
+      \fi
+    \egroup
+  \else
+    \hbox to \displaywidth \bgroup
+      \ifx\p_location\v!left
+        \rlap{\box\b_strc_formulas_number}%
+        \hfill\box\b_strc_formulas_content\hfill
+      \else
+        \hfill\box\b_strc_formulas_content\hfill
+        \llap{\box\b_strc_formulas_number}%
+      \fi
+    \egroup
+  \fi}
+
+\installcorenamespace{mathdisplayspacemodel}
+
+\setvalue{\??mathdisplayspacemodel\v!before:1}% old
+  {\ifx\p_spacebefore\v!none
+     % nothing
+   \else
+     \directvspacing\p_spacebefore
+   \fi}
+
+\setvalue{\??mathdisplayspacemodel\v!after:1}% old
+  {\prevdepth .5\strutdp
+   \edef\p_spaceafter{\formulaparameter\c!spaceafter}%
+   \ifx\p_spaceafter\v!none
+     % nothing
+   \else
+     \directvspacing\p_spaceafter
+   \fi}
+
+\setvalue{\??mathdisplayspacemodel\v!before:2}% old
+  {\ifx\p_spacebefore\v!none
+     % nothing
+   \else
+     \directvspacing\p_spacebefore
+   \fi
+   \prevdepth-\maxdimen} % texbook pagina 79-80
+
+\setvalue{\??mathdisplayspacemodel\v!after:2}% old
+  {\prevdepth\lineheight
+   \edef\p_spaceafter{\formulaparameter\c!spaceafter}%
+   \ifx\p_spaceafter\v!none
+     % nothing
+   \else
+     \directvspacing\p_spaceafter
+   \fi}
+
+\setvalue{\??mathdisplayspacemodel\v!before:3}%
+  {% not ok, try \stopformula\par\startformula vs \stopformula\startformula
+   \let\m_spacebefore\empty
+   \ifvmode
+     \ifdim\lastskip>\zeropoint\else
+       \ifdim\prevdepth<\zeropoint\else
+         \ifdim\prevdepth<\strutdp
+           % maybe add a tracing option here
+           \ifgridsnapping
+             \let\m_spacebefore\v!depth
+           \else
+             \edef\m_spacebefore{\the\dimexpr\strutdp-\prevdepth\relax}%
+           \fi
+         \fi
+       \fi
+     \fi
+     \nointerlineskip
+   \fi
+   \ifempty\m_spacebefore
+     \ifx\p_spacebefore\v!none
+       % nothing
+     \orelse\ifempty\p_spacebefore
+       \directvspacing\currentvspacing
+     \else
+       \directvspacing{\p_spacebefore,\the\scratchdimen}%
+     \fi
+   \else
+     \ifx\p_spacebefore\v!none
+       \directvspacing{\m_spacebefore}%
+     \orelse\ifempty\p_spacebefore
+       \directvspacing{\m_spacebefore,\currentvspacing}%
+     \else
+       \directvspacing{\m_spacebefore,\p_spacebefore}%
+     \fi
+   \fi}
+
+\setvalue{\??mathdisplayspacemodel\v!after:3}%
+  {\prevdepth\strutdp % \directvspacing\v!depth
+   \ifx\p_spaceafter\v!none
+     % nothing
+   \orelse\ifempty\p_spaceafter
+     \directvspacing\currentvspacing
+   \else
+     \directvspacing\p_spaceafter
+   \fi}
+
+\newconditional\c_math_model_four_indeed
+
+\setvalue{\??mathdisplayspacemodel\v!before:4}%
+  {% not ok, try \stopformula\par\startformula vs \stopformula\startformula
+   \ifvmode
+     \ifinner
+        \csname\??mathdisplayspacemodel\v!before:3\endcsname
+     \else
+       \settrue\c_math_model_four_indeed
+       \forcestrutdepth
+       \nointerlineskip
+       \ifx\p_spacebefore\v!none
+         % nothing
+       \orelse\ifempty\p_spacebefore
+         \directvspacing\currentvspacing
+       \else
+         \directvspacing{\p_spacebefore,\the\scratchdimen}%
+       \fi
+     \fi
+  \else
+     \csname\??mathdisplayspacemodel\v!before:3\endcsname
+  \fi}
+
+\setvalue{\??mathdisplayspacemodel\v!after:4}%
+  {\ifconditional\c_math_model_four_indeed
+     \setfalse\c_math_model_four_indeed
+     \forcestrutdepth
+   \else
+     \prevdepth\strutdp % \directvspacing\v!depth
+   \fi
+   \ifx\p_spaceafter\v!none
+     % nothing
+   \orelse\ifempty\p_spaceafter
+     \directvspacing\currentvspacing
+   \else
+     \directvspacing\p_spaceafter
+   \fi}
+
+\permanent\protected\def\setdisplaymathspacemodel[#1]%
+  {\ifcsname\??mathdisplayspacemodel\v!before:\number#1\endcsname
+     \c_strc_formulas_space_model#1\relax
+   \fi}
+
+% \newtoks\everybeforedisplay
+% \appendtoks\page_sides_check_floats_indeed\to\everybeforedisplay
+
+\permanent\protected\def\beforedisplayspace
+  {\ifhmode
+     \par
+   \fi
+   \ifvmode
+     \edef\p_spacebefore{\formulaparameter\c!spacebefore}%
+     \begincsname\??mathdisplayspacemodel\v!before:\number\c_strc_formulas_space_model\endcsname
+   \fi
+   \ifhmode
+     \par
+   \fi
+   \page_sides_check_floats_indeed} % probably needs more
+
+\permanent\protected\def\afterdisplayspace
+  {\ifhmode
+     \par
+   \fi
+   \ifvmode
+     \edef\p_spaceafter{\formulaparameter\c!spaceafter}%
+     \begincsname\??mathdisplayspacemodel\v!after:\number\c_strc_formulas_space_model\endcsname
+   \fi
+   \ifhmode
+     \par
+   \fi}
+
+\permanent\protected\def\setdisplaydimensions
+  {\displayindent\dimexpr
+     \d_strc_formulas_display_skip_left
+    +\d_strc_formulas_display_margin_left
+   \relax
+   \displaywidth\d_strc_formulas_display_width
+  %\setlocalhsize
+  %\displaywidth\localhsize
+   \ifdim\hangindent>\zeropoint
+     \advance\displayindent\hangindent
+   \else
+     \advance\displaywidth\hangindent
+   \fi
+   \advance\displaywidth\dimexpr
+     -\displayindent
+     -\d_strc_formulas_display_skip_right
+     -\d_strc_formulas_display_margin_right
+   \relax
+   \hsize\displaywidth} % new, else overfull in itemize
+
+\protected\def\strc_formulas_start_formula#1%
+  {\dodoubleempty\strc_formulas_start_formula_indeed[#1]}
+
+% \newskip\formulastrutht
+% \newskip\formulastrutdp
+
+%D \startbuffer
+%D \startformula[9pt] x = 1 \stopformula
+%D \startformula[7pt] x = 1 \stopformula
+%D \stopbuffer
+%D
+%D \typebuffer \getbuffer
+
+\setvalue{\??formulaoption\v!packed}%
+  {\c_strc_formulas_space_model\zerocount}
+
+\setvalue{\??formulaoption\v!tight}%
+  {\settrue\c_strc_formulas_tight}
+
+\setvalue{\??formulaoption\v!middle}%
+  {\d_strc_formulas_display_skip_left \zeropoint
+   \d_strc_formulas_display_skip_right\zeropoint}
+
+\setvalue{\??formulaoption\v!depth}%
+  {\c_strc_formulas_space_model\plusfour}
+
+\setvalue{\??formulaoption\v!line}%
+  {\ifgridsnapping
+     \setformulaparameter\c!grid{\v!math:\v!line}%
+   \fi}
+
+\setvalue{\??formulaoption\v!halfline}%
+  {\ifgridsnapping
+     \setformulaparameter\c!grid{\v!math:\v!halfline}%
+   \fi}
+
+\setvalue{\??formulaoption-\v!line}%
+  {\ifgridsnapping
+     \setformulaparameter\c!grid{\v!math:-\v!line}%
+   \fi}
+
+\setvalue{\??formulaoption-\v!halfline}%
+  {\ifgridsnapping
+     \setformulaparameter\c!grid{\v!math:-\v!halfline}%
+   \fi}
+
+% when we have 1.0.6 we wil use \mathpenaltiesmode
+%
+% \prebinoppenalty -100
+% \prerelpenalty   -100
+
+\def\strc_math_set_split
+  {\edef\p_split{\formulaparameter\c!split}%
+   \ifx\p_split\v!yes
+     \global\c_strc_math_vertical\plusone
+   \orelse\ifx\p_split\v!page
+     \global\c_strc_math_vertical\plustwo
+   \else
+     \global\c_strc_math_vertical\zerocount
+   \fi
+   \ifcase\c_strc_math_vertical
+   % \mathpenaltiesmode \zerocount
+     \clf_setmathpenalties\zerocount
+     \clf_resetmathhang
+   \else
+   % \mathpenaltiesmode \plusone
+     \clf_setmathpenalties\plusone
+     \edef\p_hang{\formulaparameter\c!hang}%
+     \ifx\p_hang\v!none
+       \global\setfalse\c_strc_math_indent
+       \clf_resetmathhang
+     \else
+       \global\settrue\c_strc_math_indent
+       \clf_setmathhang {%
+          method   {\p_hang}%
+          distance \formulaparameter\c!distance
+       }%
+     \fi
+   \fi}
+
+\setupformula
+  [\c!split=\v!no,
+   \c!distance=\zeropoint,
+  %\c!interlinespace=1.5\lineheight,
+   \c!interlinespace=,
+   \c!hang=\v!none]
+
+% for the moment (when testing) we use a penalty 1
+
+\protected\def\strc_math_align_here{\ifmmode\penalty\plusone\fi}%
+\protected\def\strc_math_break_here{\ifmmode\hfill\break \fi}%
+
+\appendtoks
+    \let\alignhere\strc_math_align_here
+    \let\breakhere\strc_math_break_here
+\to \everymathematics
+
+\protected\def\strc_formulas_start_formula_indeed[#1][#2]% setting leftskip adaption is slow !
+  {\ifhmode
+     \par
+   \fi
+   \bgroup % HERE
+   \iftrialtypesetting\else
+     \global\advance\c_strc_formulas_n\plusone
+   \fi
+   \def\currentformula{#1}%
+   \strc_math_set_split
+   \dostarttaggedchained\t!formula\currentformula\??formula
+   \setfalse\c_strc_formulas_tight
+   \d_strc_formulas_display_skip_left   \leftskip
+   \d_strc_formulas_display_skip_right  \rightskip
+   \d_strc_formulas_display_width       \formulaparameter\c!width\relax
+   \d_strc_formulas_display_margin_left \formulaparameter\c!leftmargin\relax
+   \d_strc_formulas_display_margin_right\formulaparameter\c!rightmargin\relax
+   \ifsecondargument
+     \doifelseassignment{#2}% this is new, so that we can also set the grid
+       {\setupcurrentformula[#2]%
+        \edef\p_option{\formulaparameter\c!option}}%
+       {\edef\p_option{\formulaparameter\c!option}%
+        \edef\p_option{\ifempty\p_option\else\p_option,\fi#2}}%
+   \else
+     \edef\p_option{\formulaparameter\c!option}%
+   \fi
+   \ifempty\p_option \else
+     \rawprocesscommacommand[\p_option]\strc_formulas_option
+   \fi
+   \edef\p_margin{\formulaparameter\c!margin}%
+   \ifempty\p_margin \else
+     \dosetleftskipadaption\p_margin
+     \d_strc_formulas_display_margin_left\leftskipadaption
+   \fi
+   \let\strc_formulas_start_formula\strc_formulas_start_formula_nested
+   \strc_formulas_forget_display_skips
+   \the\everybeforedisplayformula
+   \csname\e!start\formulaparameter\c!alternative\v!formula\endcsname}
+
+\protected\def\strc_formulas_start_formula_nested#1%
+  {\bgroup
+   \let\strc_formulas_stop_formula\strc_formulas_stop_formula_nested
+   \dostarttagged\t!subformula\empty}
+
+\protected\def\strc_formulas_stop_formula_nested
+  {\dostoptagged
+   \egroup}
+
+% tagging of formulanumbers is not ok (we get two display maths blobs)
+
+\newcount\c_strc_formulas_n
+
+\ifdefined\dotagregisterformula \else \let\dotagregisterformula\gobbleoneargument \fi
+
+\protected\def\strc_formulas_stop_formula
+  {\strc_formulas_place_number % in case it hasn't happened yet
+   \strc_formulas_flush_number % in case we are in native mode
+   \dostarttagged\t!formulacontent\empty
+   \dotagregisterformula\c_strc_formulas_n
+   \csname\e!stop\formulaparameter\c!alternative\v!formula\endcsname
+   \dostoptagged
+   \dostoptagged
+   \nonoindentation
+   \useindentnextparameter\formulaparameter
+   \egroup
+   \hangafter\minusone   % added for side floats
+   \hangindent\zeropoint % added for side floats
+   \setfalse\c_strc_formulas_handle_number
+   \the\everyresetformulas
+   \dorechecknextindentation} % here ?
+
+% experiment:
+
+\def\strc_formulas_set_grid_snapping
+  {\edef\p_grid{\formulaparameter\c!grid}%
+   \ifempty\p_grid \else
+     \spac_grids_snap_value_auto\p_grid
+   \fi}
+
+\appendtoks
+    \ifgridsnapping
+        \strc_formulas_set_grid_snapping
+    \fi
+\to \everybeforedisplayformula
+
+% \protected\def\switchtoformulabodyfont
+%   {\switchtobodyfont}
+
+\setuvalue{\v!formula}{\dosingleempty\strc_formulas_formula}
+
+\def\strc_formulas_formula[#1]#2% todo: tagged
+  {\begingroup
+   \edef\p_direct{#1}%
+   \ifempty\p_direct \else
+     \rawprocesscommalist[\p_direct]\strc_formulas_option
+   \fi
+   % not : \def\strc_formulas_formula[##1]##2{\mathematics{##2}}%
+   \mathematics{#2}%
+   \endgroup}
+
+%D \starttyping
+%D % test \par       % no preceding hlist
+%D % $$x$$           % preceding hlist
+%D % \noindent $$x$$ % no preceding hlist
+%D \startformula x \stopformula % now has \noindent (in mkii we messed with baselineskip)
+%D \stoptyping
+
+\permanent\protected\def\startdisplaymath
+  {\ifhmode
+     \par
+   \fi
+   \bgroup
+   \informulatrue
+   \beforedisplayspace
+   \setdisplaydimensions
+   \ifcase\c_strc_formulas_mode
+     \noindent % prevents that tex injects empty line (when using native display mechanism)
+     \Ucheckedstartdisplaymath
+     \the\everydisplay % new (probably too much)
+   \or
+     \setbox\b_strc_formulas_content\hbox\bgroup
+     \normalUstartmath
+     \displaystyle
+     \the\everydisplay % new (probably too much)
+   \else
+     \expandafter\startinnermath
+   \fi
+   \begingroup} % less interference with upcoming a \over b
+
+\permanent\protected\def\stopdisplaymath
+  {\endgroup    % less interference with upcoming a \over b
+   \ifcase\c_strc_formulas_mode
+     \Ucheckedstopdisplaymath
+   \or
+     \normalUstopmath
+     \egroup
+     \strc_formulas_flush_content_and_number
+   \else
+     \expandafter\stopinnermath
+   \fi
+   \afterdisplayspace
+   \egroup}
+
+% already defined
+%
+% \let\startinnermath\empty
+% \let\stopinnermath \empty
+
+% \defineformulaalternative[multi][\begindmath][\enddmath]
+%
+% \fakewords{20}{40}\epar
+% \placeformula {a} $$              \fakespacingformula $$
+% \fakewords{20}{40}\epar
+% \placeformula {b} \startformule   \fakespacingformula \stopformule
+% \placeformula {b} \startformule   \fakespacingformula \stopformule
+% \fakewords{20}{40}\epar
+% \placeformula {c} \startmdformule \fakespacingformula \stopmdformule
+% \placeformula {c} \startmdformule \fakespacingformula \stopmdformule
+% \fakewords{20}{40}\epar
+% \placeformula {d} \startmpformule \fakespacingformula \stopmpformule
+% \placeformula {d} \startmpformule \fakespacingformula \stopmpformule
+% \fakewords{20}{40}\epar
+% \placeformula {e} \startsdformule \fakespacingformula \stopsdformule
+% \placeformula {e} \startsdformule \fakespacingformula \stopsdformule
+% \fakewords{20}{40}\epar
+% \placeformula {f} \startspformule \fakespacingformula \stopspformule
+% \placeformula {f} \startspformule \fakespacingformula \stopspformule
+% \fakewords{20}{40}
+
+\permanent\protected\def\startsubformulas
+  {\dosingleempty\strc_formulas_start_sub_formulas}
+
+\def\strc_formulas_start_sub_formulas[#1]%
+  {\edef\currentsubformulasreference{#1}%
+   \global\settrue\c_strc_formulas_inside_formulas_sub
+   \strc_formulas_handle_sub_number}
+
+\permanent\protected\def\stopsubformulas
+  {\nonoindentation
+   \useindentnextparameter\subformulaparameter
+   \the\everyresetformulas % to be checked
+   \global\setfalse\c_strc_formulas_inside_formulas_sub
+   \dorechecknextindentation} % here ?
+
+%D Named subformulas (to be redone)
+
+\permanent\protected\def\startnamedsubformulas
+  {\dosingleempty\strc_formulas_start_named_sub_formulas}
+
+\def\strc_formulas_start_named_sub_formulas[#1]#2%
+  {\setformulalistentry{#2}%
+   \startsubformulas[#1]}
+
+\permanent\protected\def\stopnamedsubformulas
+  {\stopsubformulas}
+
+%D Experimental goodie:
+%D
+%D \startbuffer
+%D \placelist[formula][criterium=text] \blank[2*big]
+%D \placenamedformula[one]{first}  \startformula a = 1 \stopformula \endgraf
+%D \placeformula                   \startformula a = 2 \stopformula \endgraf
+%D \placenamedformula     {second} \startformula a = 3 \stopformula \endgraf
+%D \stopbuffer
+%D
+%D \typebuffer \getbuffer
+
+\permanent\protected\def\startformulas{\strc_formulas_start_formulas}
+
+\permanent\letcsname\e!stop\v!formulas\endcsname\relax
+
+\protected\def\strc_formulas_nested_formula_start
+  {\hbox to \displaywidth \bgroup
+   \hsize\displaywidth
+   \hss
+  %\Ustartmath
+   \dostarttagged\t!formulacontent\empty
+   \csname\e!start\formulaparameter\c!alternative\v!formula\endcsname}
+
+\protected\def\strc_formulas_nested_formula_stop
+  {\csname\e!stop\formulaparameter\c!alternative\v!formula\endcsname
+   \dostoptagged
+  %\Ustopmath
+   \hss
+   \egroup
+   \hss}
+
+\normalexpanded{\tolerant\def\noexpand\strc_formulas_start_formulas[#1]#:#2\csname\e!stop\v!formulas\endcsname}%
+  {\startformula
+   \dostarttagged\t!formulaset\empty
+   \global\settrue\c_strc_formulas_inside_formulas
+   \edef\currentformulasreference{#1}%
+   \strc_formulas_handle_number
+   \let\currentformula\empty
+   \strc_formulas_forget_display_skips
+   \enforced\protected\def\startformula
+     {\advance\scratchcounter\plusone
+      \expandafter\gobbleuntil\csname\e!stop\v!formula\endcsname}%
+   \scratchcounter\zerocount
+   #2% preroll
+   \hbox to \displaywidth \bgroup
+     \divide\displaywidth\scratchcounter
+     \hss
+     \enforced\let\startformula\strc_formulas_nested_formula_start
+     \enforced\let\stopformula \strc_formulas_nested_formula_stop
+     #2%
+   \egroup
+   \global\setfalse\c_strc_formulas_inside_formulas
+   \dostoptagged
+   \stopformula
+   \the\everyresetformulas
+   \hangafter\minusone    % added for side floats
+   \hangindent\zeropoint} % added for side floats
+
+% place
+
+\def\m_strc_formulas_flag_inhibit{-}
+\def\m_strc_formulas_flag_force  {+}
+
+\def\strc_formulas_check_reference#1#2%
+  {#1\unless\ifempty\namedformulaentry % \relax % new 29/8/2010
+     \plusthree
+   \orelse\ifempty#2%
+     \zerocount
+   \orelse\ifx#2\m_strc_formulas_flag_force
+     \plusone
+   \orelse\ifx#2\m_strc_formulas_flag_inhibit
+     \plustwo
+   \else
+     \plusthree
+   \fi}
+
+\permanent\protected\def\formulanumber
+  {\strc_formulas_number} % for the moment
+
+\tolerant\protected\def\strc_formulas_number[#1]%
+  {\def\currentformulareference{#1}%
+   \strc_formulas_place_number_in_box}
+
+\permanent\protected\def\placeformula   {\global\settrue\c_strc_formulas_inside_place}
+\permanent\protected\def\placesubformula{\global\settrue\c_strc_formulas_inside_place_sub}
+
+\tolerant\protected\def\strc_formulas_place[#1]%
+  {\def\currentplaceformulareference{#1}%
+   \let\currentplaceformulasuffix\empty
+   \doifelsenextbgroup\strc_formulas_place_yes\strc_formulas_place_nop} % [ref]{}
+
+\protected\def\strc_formulas_place_yes#1%
+  {\def\currentplaceformulasuffix{#1}%
+   \strc_formulas_place_nop}
+
+\protected\def\strc_formulas_place_nop
+  {\doifelsenextchar$\strc_formulas_place_pickup\strc_formulas_place_indeed} % [ref]$$ [ref]\start
+
+\protected\def\strc_formulas_place_indeed
+  {\strc_formulas_place_numbering}
+
+\protected\def\strc_formulas_place_pickup$$#1$$%
+  {\strc_formulas_place_numbering
+   \strc_formulas_start_formula{}#1\strc_formulas_stop_formula}
+
+% \let\startplaceformula\placeformula
+% \let\stopplaceformula \relax
+
+% \startplaceformula                 \startformula e=mc^2 \stopformula \stopplaceformula
+% \startplaceformula[-]              \startformula e=mc^2 \stopformula \stopplaceformula
+% \startplaceformula[x]              \startformula e=mc^2 \stopformula \stopplaceformula
+% \startplaceformula[reference=foo]  \startformula e=mc^2 \stopformula \stopplaceformula
+% \startplaceformula[title=whatever] \startformula e=mc^2 \stopformula \stopplaceformula
+% \startplaceformula[suffix=x]       \startformula e=mc^2 \stopformula \stopplaceformula
+
+\let\currentplaceformulareference\empty
+\let\currentplaceformulasuffix   \empty
+
+\permanent\tolerant\protected\def\startplaceformula[#1]%
+  {\begingroup
+   \global\settrue\c_strc_formulas_inside_place
+   \ifparameter#1\or
+     \expandafter\strc_formulas_start_place_yes
+   \else
+     \expandafter\strc_formulas_start_place_nop
+   \fi[#1]}
+
+\def\strc_formulas_start_place_yes[#1]%
+  {\doifassignmentelse{#1}\strc_formulas_start_place_parameters\strc_formulas_start_place_reference[#1]}
+
+\def\strc_formulas_start_place_nop[#1]%
+  {\let\currentplaceformulareference\empty
+   \let\currentplaceformulasuffix   \empty
+   \strc_formulas_place_nop}
+
+\def\strc_formulas_start_place_reference[#1]%
+  {\edef\currentplaceformulareference{#1}%
+   \let\currentplaceformulasuffix\empty
+  %\doifelsenextbgroup\strc_formulas_place_yes\strc_formulas_place_nop} % [ref]{}
+   \strc_formulas_place_nop}
+
+\def\strc_formulas_start_place_parameters[#1]%
+  {\letdummyparameter\c!title    \empty
+   \letdummyparameter\c!reference\empty
+   \letdummyparameter\c!suffix   \empty
+   \getdummyparameters[#1]%
+   \edef\currentplaceformulatitle    {\dummyparameter\c!title}%
+   \edef\currentplaceformulareference{\dummyparameter\c!reference}%
+   \edef\currentplaceformulasuffix   {\dummyparameter\c!suffix}%
+   \ifempty\currentplaceformulatitle\else
+     \normalexpanded{\setformulalistentry{\currentplaceformulatitle}}%
+   \fi
+   \doifelsenextbgroup\strc_formulas_place_yes\strc_formulas_place_nop} % [ref]{}
+
+\permanent\protected\def\stopplaceformula
+  {\relax
+   \endgroup}
+
+% to be checked
+
+\let\strc_formulas_place_number       \relax
+\let\strc_formulas_place_number_nested\gobbletwoarguments
+
+\def\strc_formulas_place_number_nested_indeed#1#2%
+  {\def\currentnestedformulareference{#1}%
+   \def\currentnestedformulasuffix{#2}%
+   \strc_formulas_check_reference\c_strc_formulas_nested_number_mode\currentnestedformulareference
+   \ifcase\c_strc_formulas_nested_number_mode
+     % nothing
+   \or
+     \glet\strc_formulas_place_number\relax
+     \expandafter\strc_formulas_number % hm, looks ahead for []
+   \or
+     % nothing
+   \or
+     \glet\strc_formulas_place_number\relax
+     \expandafter\strc_formulas_number % hm, looks ahead for []
+   \fi}
+
+\def\strc_formulas_place_number_indeed
+  {\strc_formulas_place_number_in_box}
+
+\def\strc_formulas_place_number_in_box
+  {\dostarttagged\t!formulacaption\empty
+   \global\setbox\b_strc_formulas_number\naturalhbox{\strc_formulas_number_indeed}%
+   \dostoptagged}
+
+\def\strc_formulas_flush_number
+  {\ifcase\c_strc_formulas_mode
+     \ifzeropt\wd\b_strc_formulas_number
+        % nothing to be done
+     \orelse\ifx\p_location\v!left
+       \math_native_leqno{\box\b_strc_formulas_number}%
+     \else
+       \math_native_reqno{\box\b_strc_formulas_number}%
+     \fi
+   \fi}
+
+% todo
+
+\permanent\tolerant\protected\def\placenamedformula[#1]%
+  {\ifarguments
+     \expandafter\strc_formulase_place_named_nop
+   \else
+     \expandafter\strc_formulase_place_named_yes
+   \fi[#1]}
+
+\def\strc_formulase_place_named_yes[#1]#2%
+  {\setformulalistentry{#2}%
+   \placeformula[#1]}
+
+\def\strc_formulase_place_named_nop[#1]#2%
+  {\setformulalistentry{#2}%
+   \placeformula}
+
+\mutable\let\namedformulaentry\empty % \relax % this will become a key/value so that we can do bookmarks
+
+\permanent\protected\def\setformulalistentry#1%
+  {\gdef\namedformulaentry{#1}}
+
+\protect \endinput
+
+% \abovedisplayshortskip0pt \belowdisplayshortskip0pt \abovedisplayskip0pt \belowdisplayskip0pt \forgetall
+%
+% test       \par                      $$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$ \par test \par
+% test       \par                      $$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$ \par test \par
+% test plus  \par \prevdepth \maxdimen $$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$ \par test \par
+% test minus \par \prevdepth-\maxdimen $$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$ \par test \par
+%
+% \parskip\baselineskip
+%
+% test       \par                      $$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$ \par test \par
+% test       \par                      $$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$ \par test \par
+% test plus  \par \prevdepth \maxdimen $$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$ \par test \par
+% test minus \par \prevdepth-\maxdimen $$xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx$$ \par test \par
diff --git a/tex/context/base/mkiv/strc-reg.mkxl b/tex/context/base/mkiv/strc-reg.mkxl
index 31f73ca69..97933ffb8 100644
--- a/tex/context/base/mkiv/strc-reg.mkxl
+++ b/tex/context/base/mkiv/strc-reg.mkxl
@@ -643,8 +643,11 @@
      }%
    \relax}
 
+% \def\strc_registers_limited_entry#1%
+%   {\limitatetext{#1}\currentregistermaxwidth\unknown}%
+
 \def\strc_registers_limited_entry#1%
-  {\limitatetext{#1}\currentregistermaxwidth\unknown}%
+  {\limitated left \currentregistermaxwidth sentinel {\unknown} text {#1} freeze true\relax}
 
 \aliased\let\limitedregisterentry\firstofoneargument
 
diff --git a/tex/context/base/mkiv/strc-ren.mkxl b/tex/context/base/mkiv/strc-ren.mkxl
new file mode 100644
index 000000000..2d553964b
--- /dev/null
+++ b/tex/context/base/mkiv/strc-ren.mkxl
@@ -0,0 +1,817 @@
+%D \module
+%D   [       file=strc-ren,
+%D        version=2008.10.20,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Section Rendering,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Structure Macros / Section Rendering}
+
+\unprotect
+
+\newbox\b_strc_rendering_head
+
+\newdimen\d_strc_rendering_local_leftoffset
+\newdimen\d_strc_rendering_local_rightoffset
+
+% Martin Kolarik's problem:
+%
+% \setuphead[section][command=\doTitle]
+% \def\doTitle#1#2{\ruledvbox{\forgetall \hsize=4cm \ruledhbox{\ruledvtop{#1}\ruledvtop{#2}}}}
+% \section{test test test test test test test test test test test test test test test test test}
+
+% \newtoks\everyheadstart % not used currently
+
+\protected\def\strc_rendering_initialize_style_and_color
+  {\ifconditional\headisdisplay
+     \expandafter\strc_rendering_initialize_style_and_color_display
+   \else
+     \expandafter\strc_rendering_initialize_style_and_color_inline
+   \fi}
+
+\protected\def\strc_rendering_initialize_style_and_color_display#1#2%
+  {\dontconvertfont
+   \edef\p_strc_rendering_interlinespace{\headparameter\c!interlinespace}%
+   \ifempty\p_strc_rendering_interlinespace
+     % here the interline space is only set when style sets no space
+     \setfalse\fontattributeisset % use the currentfontparameter state instead
+     \setfalse\interlinespaceisset
+     \useheadstyleandcolor\c!style\c!color\relax
+     \ifconditional\fontattributeisset \ifconditional\interlinespaceisset \else
+       \setupinterlinespace
+     \fi \fi
+     \setfalse\fontattributeisset
+     \useheadstyleandcolor#1#2\relax
+     \ifconditional\fontattributeisset \ifconditional\interlinespaceisset \else
+       \setupinterlinespace
+     \fi \fi
+   \else
+     % here the set interline space overloads any other set space in the style
+     \setfalse\fontattributeisset
+     \useheadstyleandcolor\c!style\c!color\relax
+     \ifconditional\fontattributeisset
+       \dosetupcheckedinterlinespace\p_strc_rendering_interlinespace
+     \fi
+     \setfalse\fontattributeisset
+     \useheadstyleandcolor#1#2\relax
+     \ifconditional\fontattributeisset
+       \dosetupcheckedinterlinespace\p_strc_rendering_interlinespace
+     \fi
+   \fi}
+
+\protected\def\strc_rendering_initialize_style_and_color_inline#1#2%
+   {\dontconvertfont
+    \setfalse\fontattributeisset
+    \useheadstyleandcolor\c!style\c!color\relax
+    \ifconditional\fontattributeisset
+      \updateraggedskips % \setupspacing
+    \fi
+    \setfalse\fontattributeisset
+    \useheadstyleandcolor#1#2\relax
+    \ifconditional\fontattributeisset
+      \updateraggedskips % \setupspacing
+    \fi}
+
+\let\currentstructurereferenceattribute\attributeunsetvalue
+
+\permanent\def\headreferenceattributes
+  {\iflocation
+   % \ctxlua{structures.lists.taglocation(\the\locationcount)}% maybe ... tags entry as used
+     attr \destinationattribute \currentstructureattribute
+     attr \referenceattribute   \currentstructurereferenceattribute
+   % attr \internalattribute    \locationcount
+   \fi}
+
+\permanent\def\setinlineheadreferenceattributes
+  {\ifconditional\headisdisplay \else \iflocation
+     \c_attr_destination\currentstructureattribute
+     \c_attr_reference  \currentstructurereferenceattribute
+   % \c_attr_internal   \locationcount
+   \fi \fi}
+
+\permanent\protected\def\docheckheadreference
+  {\edef\currentheadinteraction{\headparameter\c!interaction}%
+   \ifx\currentheadinteraction\v!list
+     % setuphead[<section>][interaction=list,...]
+     \strc_references_get_simple_reference{*\the\locationcount}%
+     \let\currentstructurereferenceattribute\currentreferenceattribute
+   \orelse\ifx\currentheadinteraction\v!reference
+     % setuphead[<section>][interaction=reference,...] start<section>[backreference=abc,...]
+     \edef\currentheadbackreference{\structurevariable\c!backreference}% weird, was references.backreference
+     \ifempty\currentheadbackreference \else
+       \strc_references_get_simple_reference\currentheadbackreference
+       \let\currentstructurereferenceattribute\currentreferenceattribute
+     \fi
+   \else
+      % maybe auto: backreference when given, else list
+   \fi}
+
+% a bit messy ... empty in place instead of self .. might change (or use special
+% whatsig (invisible user one)
+
+\protected\def\strc_rendering_place_head_text
+  {\strc_rendering_start_placement
+   \setheadmarking
+   \doresetstructureheadnumbercontent
+   \ifconditional\c_strc_sectioning_empty
+     \setbox\b_strc_rendering_head\hpack \headreferenceattributes to \zeropoint{\strut}%
+   \else
+     \docheckheadreference
+     \setbox\b_strc_rendering_head\hbox \headreferenceattributes
+       {\spac_grids_set_local_snapping{\headparameter\c!internalgrid}%
+        \doresetstructureheadnumbercontent
+        \useheadstyleparameter\c!style
+        \setinlineheadreferenceattributes
+        \strc_rendering_inject_text}%
+   \fi
+   \strc_rendering_stop_placement}
+
+\protected\def\strc_rendering_place_head_number_and_text
+  {\strc_rendering_start_placement
+   \setheadmarking
+   \doifelsetext\getheadnumber
+     \dosetstructureheadnumbercontent
+     \doresetstructureheadnumbercontent
+   \ifconditional\c_strc_sectioning_empty
+     \setbox\b_strc_rendering_head\hpack \headreferenceattributes to \zeropoint{\strut}%
+   \else % = needed
+     \docheckheadreference
+     \setbox\b_strc_rendering_head\hbox \headreferenceattributes
+       {\spac_grids_set_local_snapping{\headparameter\c!internalgrid}%
+        \useheadstyleparameter\c!style
+        \setinlineheadreferenceattributes
+        \strc_rendering_inject_number_and_text}%
+   \fi
+   \strc_rendering_stop_placement}
+
+\protected\def\strc_rendering_place_head_empty
+  {\hpack\headreferenceattributes{\getheadsyncs}}
+
+%D \starttyping
+%D \def\StretchedBox#1%
+%D   {\framed
+%D      [frame=off,offset=.5em,align=middle,width=broad]
+%D      {\sc\def\stretchedspaceamount{.3em}\stretchednormalcase{#1}}}
+%D
+%D \definehead[MySubject][subject]
+%D \setuphead [MySubject][deeptextcommand=\StretchedBox]
+%D
+%D \MySubject{feeling stretched feeling stretched feeling stretched feeling stretched}
+%D \stoptyping
+
+% helpers
+
+\permanent\protected\def\headhbox{\hbox\headreferenceattributes}
+\permanent\protected\def\headvbox{\vbox\headreferenceattributes}
+
+\permanent\protected\def\startlocalheadsetup{\bgroup\strc_rendering_initialize_spacing}
+\permanent\protected\def\stoplocalheadsetup {\egroup}
+
+\protected\def\strc_rendering_initialize_spacing
+  {\forgetall % local !
+   \edef\p_align{\headparameter\c!align}%
+   \ifempty\p_align \else
+     \setupalign[\p_align]%
+   \fi
+   \edef\p_tolerance{\headparameter\c!tolerance}%
+   \ifempty\p_tolerance \else
+     \setuptolerance[\p_tolerance]%
+   \fi
+   \edef\p_strut{\headparameter\c!strut}%
+   \ifx\p_strut\v!no
+     \setnostrut
+   \fi
+   \enforced\let\\\strc_rendering_shortcut_backslash}
+
+\protected\def\strc_rendering_shortcut_backslash
+  {\crlf
+   \strut
+   \ignorespaces}
+
+\def\strc_rendering_start_placement
+  {\bgroup
+   \setsystemmode\currenthead
+   \strc_rendering_initialize_alternatives
+   \strc_rendering_initialize_dimensions
+   \strc_rendering_initialize_line_state
+   \reseteverypar % needed indeed
+   \noindent      % ipv \whitespace elders, na \forgetall !
+   \bgroup
+   \synctexpushline
+   \edef\p_aligntitle{\headparameter\c!aligntitle}%
+   \ifx\p_aligntitle\v!yes
+     \strc_rendering_initialize_hsize_local
+   \orelse\ifx\p_aligntitle\v!float
+     \strc_rendering_initialize_hsize_local
+   \else
+     \strc_rendering_initialize_hsize_global
+   \fi
+   \setfalse\inhibitmargindata % brrrr is set in forgetall
+   \dontcomplain
+   \postponenotes
+   \strc_rendering_initialize_interaction
+   % delayed
+   \let\localheadsetup  \strc_rendering_initialize_spacing % historic name
+   \let\headsetupspacing\strc_rendering_initialize_spacing}
+
+\def\strc_rendering_initialize_interaction
+  {\resetinteractionparameter\c!style
+   \resetinteractionparameter\c!color
+   \resetinteractionparameter\c!contrastcolor}
+
+% \setuphead[chapter]         [style=\bfd,after=,hang=line] % fit broad 2
+% \setuphead[section]         [style=\bfc,after=,hang=line]
+% \setuphead[subsection]      [style=\bfb,after=,hang=line]
+% \setuphead[subsubsection]   [style=\bfa,after=,hang=line]
+% \setuphead[subsubsubsection][style=\bf ,after=,hang=line]
+%
+% \chapter         {Test} \input tufte \page
+% \section         {Test} \input tufte \page
+% \subsection      {Test} \input tufte \page
+% \subsubsection   {Test} \input tufte \page
+% \subsubsubsection{Test} \input tufte \page
+%
+% \chapter         {Test\\Test} \input tufte \page
+% \section         {Test\\Test} \input tufte \page
+% \subsection      {Test\\Test} \input tufte \page
+% \subsubsection   {Test\\Test} \input tufte \page
+% \subsubsubsection{Test\\Test} \input tufte \page
+
+\newdimen\d_strc_rendering_hang_height
+\newcount\n_strc_rendering_hang_lines
+
+\newdimen\d_strc_rendering_local_height
+\newdimen\d_strc_rendering_local_depth
+\newdimen\d_strc_rendering_local_lineheight
+
+\def\strc_rendering_initialize_line_state
+  {\global\d_strc_rendering_local_height\strutht
+   \global\d_strc_rendering_local_depth\strutdp
+   \global\d_strc_rendering_local_lineheight\lineheight}
+
+\def\strc_rendering_check_hang
+  {\begingroup
+   \openlineheight\d_strc_rendering_local_lineheight
+   \d_strc_rendering_hang_height\htdp\b_strc_rendering_head
+   \getnoflines\d_strc_rendering_hang_height
+   \normalexpanded{\endgroup\n_strc_rendering_hang_lines\the\numexpr\noflines-\plusone\relax}% brrr
+   \setbox\b_strc_rendering_head\hpack{\lower\n_strc_rendering_hang_lines\d_strc_rendering_hang_height\box\b_strc_rendering_head}%
+   \d_strc_rendering_hang_height\dimexpr\htdp\b_strc_rendering_head-\d_strc_rendering_local_height+\strutdp\relax
+   \ht\b_strc_rendering_head\strutht
+   \dp\b_strc_rendering_head\strutdp
+   \d_strc_rendering_local_depth\strutdp}
+
+\installcorenamespace{headplacementcheckhang}
+
+\setvalue{\??headplacementcheckhang\v!line   }{\strc_rendering_check_hang
+                                               \n_strc_rendering_hang_lines\zerocount}
+\setvalue{\??headplacementcheckhang\v!broad  }{\strc_rendering_check_hang
+                                               \getnoflines\d_strc_rendering_hang_height}
+\setvalue{\??headplacementcheckhang\v!fit    }{\strc_rendering_check_hang
+                                               \getrawnoflines\d_strc_rendering_hang_height}
+\setvalue{\??headplacementcheckhang\v!none   }{\n_strc_rendering_hang_lines\zerocount}
+\setvalue{\??headplacementcheckhang          }{\n_strc_rendering_hang_lines\zerocount}
+\setvalue{\??headplacementcheckhang\s!unknown}{\strc_rendering_check_hang
+                                               \n_strc_rendering_hang_lines\numexpr\headparameter\c!hang-\plusone\relax}
+
+\def\strc_rendering_initialize_line_hang
+   {\ifconditional\headisdisplay
+      \expandnamespaceparameter\??headplacementcheckhang\headparameter\c!hang\s!unknown
+      \relax
+    \else
+      \n_strc_rendering_hang_lines \zerocount
+      \d_strc_rendering_hang_height\zeropoint
+    \fi}
+
+\def\strc_rendering_initialize_hsize_local
+  {\global\d_strc_rendering_local_leftoffset \leftskip
+   \global\d_strc_rendering_local_rightoffset\rightskip
+ % \forgetall
+ % \leftskip \d_strc_rendering_local_leftoffset  % no stretch
+ % \rightskip\d_strc_rendering_local_rightoffset % no stretch
+ % \setlocalhsize
+ % \hsize\localhsize
+ % \forgetbothskips}
+   \scratchwidth\availablehsize
+   \forgetall
+   \hsize\scratchwidth}
+
+\def\strc_rendering_initialize_hsize_global
+  {\global\d_strc_rendering_local_leftoffset \zeropoint
+   \global\d_strc_rendering_local_rightoffset\zeropoint
+   \forgetall}
+
+% \def\strc_sectioning_stay_on_this_line
+%   {\directcheckedvspacing{-\v!line,\v!samepage,\v!nowhite}%
+%    \directcheckedvspacing\v!disable}
+%
+% we now use \ignoreparskip, so:
+
+\def\strc_sectioning_stay_on_this_line
+  {\directcheckedvspacing{-\v!line,\v!samepage}%
+   \directcheckedvspacing\v!disable}
+
+\def\strc_rendering_stop_placement
+  {\n_strc_rendering_hang_lines\zerocount
+   \ifconditional\headisdisplay
+     \strc_rendering_initialize_line_hang
+     % kind of special, we want to snap heads also according to local specs local
+     \setbox\b_strc_rendering_head\hbox
+       {\hskip\dimexpr\d_strc_rendering_local_leftoffset+\headparameter\c!margin\relax
+        \box\b_strc_rendering_head
+        \getheadsyncs % a latelua why not in the box
+        }%
+     \ifgridsnapping
+       \applygridmethod
+         {\headparameter\c!grid}%
+         {\ifconditional\headisdisplay
+            \strc_rendering_initialize_style_and_color_display\c!textstyle\c!textcolor
+          \fi}%
+         {\box\b_strc_rendering_head}
+     \else
+       \box\b_strc_rendering_head
+     \fi
+     \flushnotes % new, not really needed
+     \endgraf
+     \ifvmode
+       \ifnum\n_strc_rendering_hang_lines>\zerocount
+         \dorecurse\n_strc_rendering_hang_lines{\nointerlineskip\dosomebreak\nobreak\strut\endgraf}% to be checked
+       \fi
+       \nointerlineskip
+       \dosomebreak\nobreak
+     \fi
+%      \getheadsyncs % a latelua why not in the box
+   \else
+     % somehow this goes ok even when we push in the margin probably because we gobble pars
+     % in the process of collecting index entries etc
+     \strut
+     \flushnotes % new, here since we're in par mode
+     \unhbox\b_strc_rendering_head
+     \getheadsyncs % a latelua
+     \ifconditional\headissomewhere
+       \strc_sectioning_stay_on_this_line % test case: alternative=margintext and \startparagraph ..
+     \else
+      %\hskip\headnumberdistance\s!plus\headnumberdistance\s!minus.25\dimexpr\headnumberdistance\relax
+       \hskip\headtextdistance\relax
+       \strc_sectioning_inject_continuous_signal
+     \fi
+   \fi
+   \ifconditional\headisdisplay
+     \ifvmode
+       \ifgridsnapping % important, font related depth, see comment
+         \prevdepth\strutdp
+       \else
+         \prevdepth\d_strc_rendering_local_depth
+       \fi
+     \fi
+   \fi
+   \synctexpopline
+   \egroup
+   \egroup
+   \ifconditional\headisdisplay
+     \useindentnextparameter\headparameter
+   \orelse\ifconditional\headissomewhere
+     \ignoreparskip
+     \noindentation
+   \else
+     \ignoreparskip
+   \fi}
+
+% nice testcase
+%
+% \setupheads[aligntitle=yes]
+%
+% \startnarrower
+%   \subject{\dorecurse{100}{x }}
+%   \section{\dorecurse{100}{x }}
+%   \input tufte \par
+%   \setupheads[alternative=inmargin]
+%   \subject{\dorecurse{100}{x }}
+%   \section{\dorecurse{100}{x }}
+%   \input tufte \par
+% \stopnarrower
+
+% \dodefineheadplacement[sectiona][vertical]{#1->#2}
+% \dodefineheadplacement[sectionb][vertical]#1#2{#1->#2}
+%
+% \setuphead[section][alternative=sectiona]
+% \setuphead[subsection][alternative=sectionb]
+
+% \startsetups[\??headrenderings:\v!vertical:\v!sectiona]
+%     ... there will be a more public namespace
+% \stopsetups
+
+\installcorenamespace{headplacementalternative}
+\installcorenamespace{headrenderings}
+\installcorenamespace{headalternative}
+
+\installcommandhandler \??headalternative {headalternative} \??headalternative % or just \??head
+
+\setupheadalternative
+  [%\c!width=\headparameter\c!width,
+   %\c!distance=\headparameter\c!distance,
+   \c!alternative=\v!vertical,
+   \c!renderingsetup=\??headrenderings:\currentheadalternative]
+
+\let\currentheadalternative         \v!normal
+\let\currentheadrenderingsetup      \empty
+\let\currentheadrenderingalternative\v!vertical
+
+\permanent\tolerant\protected\def\defineheadplacement[#1]#*[#2]%
+  {\doifelsenextbgroup
+     {\strc_rendering_define_placement_yes[#1][#2]}%
+     {\strc_rendering_define_placement_nop[#1][#2]}}
+
+\def\strc_rendering_define_placement_yes[#1][#2]%
+  {\defineheadalternative[#1][\c!alternative=#2,\c!renderingsetup=\??headrenderings:\v!command]%
+   \setuvalue{\??headplacementalternative#1}##1##2}
+
+\def\strc_rendering_define_placement_nop[#1][#2]%
+  {\defineheadalternative[#1][\c!alternative=#2,\c!renderingsetup=\??headrenderings:\v!command]%
+   \setuvalue{\??headplacementalternative#1}}
+
+% these can be used in setups:
+%
+% \headnumbercontent
+% \headtextcontent
+%
+% \headwidth
+% \headtextwidth
+% \headnumberdistance
+% \headnumberwidth
+% \headsetupspacing
+%
+% \headshownumber
+% \headisdisplay
+
+\let\headnumbercontent\empty
+\let\headtextcontent  \empty
+
+\newdimen\headwidth
+\newdimen\headtextwidth
+\newskip \headtextdistance
+\newdimen\headnumberdistance
+\newdimen\headnumberwidth
+
+% \newconditional\headshownumber % defined already
+% \newconditional\headisdisplay  % defined already
+
+\protected\def\strc_rendering_initialize_alternatives
+  {\edef\currentheadalternative{\headparameter\c!alternative}%
+   \ifcsname\currentheadalternativehash\s!parent\endcsname \else
+      \let\currentheadalternative\v!normal % cf. mkii
+   \fi
+   \edef\currentheadrenderingsetup{\headalternativeparameter\c!renderingsetup}%
+   \edef\currentheadrenderingalternative{\headalternativeparameter\c!alternative}%
+   \ifempty\currentheadrenderingalternative
+     \let\currentheadrenderingalternative\v!vertical
+   \fi
+   \ifx\currentheadrenderingalternative\v!horizontal
+     \global\setfalse\headisdisplay   % global
+     \global\setfalse\headissomewhere % global
+   \orelse\ifx\currentheadrenderingalternative\v!somewhere
+     \global\setfalse\headisdisplay   % global
+     \global\settrue \headissomewhere % global
+   \else
+     \global\settrue \headisdisplay   % global
+     \global\setfalse\headissomewhere % global
+   \fi}
+
+\protected\def\strc_rendering_initialize_dimensions
+  {\headwidth         \headparameter\c!width       \relax  % \zeropoint == unset
+   \headnumberwidth   \headparameter\c!numberwidth \relax  % \zeropoint == unset
+   \headnumberdistance\headparameter\c!distance    \relax
+   \headtextdistance  \headparameter\c!textdistance\relax
+   \headtextwidth     \headparameter\c!textwidth   \relax} % \zeropoint == unset
+
+\permanent\protected\def\headtextcontent
+  {\begingroup
+     \strc_rendering_initialize_style_and_color\c!textstyle\c!textcolor
+     \headparameter\c!commandbefore\relax
+     \ifcsname\currentheadhash\c!deeptextcommand\endcsname
+      %\expandafter\let\expandafter\deepstructuretitlecommand\csname\currentheadhash\c!deeptextcommand\endcsname
+       \expandafter\let\expandafter\deepstructuretitlecommand\lastnamedcs
+     \fi
+     \ifconditional\headisdisplay
+       % struts can be nilled with \setnostrut
+       \headparameter\c!textcommand{\setstrut\begstrut\getheadtitle\endstrut}%
+       \global\d_strc_rendering_local_height\strutht
+       \global\d_strc_rendering_local_depth\strutdp
+       \global\d_strc_rendering_local_lineheight\lineheight
+       \headparameter\c!commandafter\relax
+       \endgraf
+     \else
+       \headparameter\c!textcommand{\getheadtitle}%
+       \headparameter\c!commandafter\relax
+     \fi
+   \endgroup}
+
+\permanent\protected\def\headnumbercontent
+  {\begingroup
+     \strc_rendering_initialize_style_and_color\c!numberstyle\c!numbercolor
+     \ifcsname\currentheadhash\c!deepnumbercommand\endcsname
+      %\expandafter\let\expandafter\deepstructurenumbercommand\csname\currentheadhash\c!deepnumbercommand\endcsname
+       \expandafter\let\expandafter\deepstructurenumbercommand\lastnamedcs
+     \fi
+     \ifconditional\headisdisplay
+       % can be nilled with \setnostrut
+       \headparameter\c!numbercommand{\setstrut\begstrut\getheadnumber\endstrut}%
+     \else
+       \headparameter\c!numbercommand{\getheadnumber}%
+     \fi
+   \endgroup}
+
+\permanent\protected\def\fakedheadnumber{\vphantom{0}} % needed for mathplus
+
+% \permanent\protected\def\fakeheadnumbercontent
+%   {\hbox to \zeropoint{\let\getheadnumber\fakedheadnumber\headnumbercontent}}
+
+\permanent\protected\def\fakeheadnumbercontent
+  {\edef\p_hidenumber{\headparameter\c!hidenumber}%
+   \ifx\p_hidenumber\v!yes\else
+     \hbox to \zeropoint{\let\getheadnumber\fakedheadnumber\headnumbercontent}%
+   \fi}
+
+\permanent\protected\def\strc_rendering_inject_number_and_text
+  {\edef\p_command{\headparameter\c!command}% assumes \protected definition
+   \ifempty\p_command
+     \directsetup\currentheadrenderingsetup
+   \else
+     \p_command\headnumbercontent\headtextcontent
+   \fi}
+
+\protected\def\strc_rendering_inject_text
+  {\edef\p_command{\headparameter\c!command}% assumes \protected definition
+   \ifempty\p_command
+     \directsetup\currentheadrenderingsetup
+   \else
+     \p_command\empty\headtextcontent
+   \fi}
+
+\startsetups[\??headrenderings:\v!command]
+    \csname\??headplacementalternative\currentheadalternative\endcsname \headnumbercontent \headtextcontent
+\stopsetups
+
+% obsolete
+%
+% \def\normalplacehead % hooks into \c!command
+%   {\csname\??headplacementalternative\ifcsname\??headplacementalternative\currentheadalternative\endcsname\currentheadalternative\else\v!normal\fi\endcsname}
+
+\defineheadalternative
+  [\v!paragraph]
+  [\c!alternative=\v!vertical,
+   \c!renderingsetup=\??headrenderings:\v!paragraph]
+
+\startsetups[\??headrenderings:\v!paragraph]
+    \vbox {
+        \headsetupspacing
+        \begstrut
+        \ifconditional\headshownumber % \ifheadnumbercontent
+            \headnumbercontent
+            \hskip\headnumberdistance
+        \fi
+        \headtextcontent
+    }
+\stopsetups
+
+% \setuphead
+%   [chapter]
+%   [numberwidth=2cm,hang=line,after={\blank[3*line]}]
+%
+% \chapter{Oeps oeps oeps} \input tufte   \section{Oeps}
+% \chapter{Oeps oeps oeps} \section{Oeps} \input tufte
+
+\defineheadalternative
+  [\v!normal]
+  [\c!alternative=\v!vertical,
+   \c!renderingsetup=\??headrenderings:\v!normal]
+
+\startsetups[\??headrenderings:\v!normal]
+    \vbox {
+        \headsetupspacing
+        \ifconditional\headshownumber
+            \ifzeropt\headwidth \else
+                \ifzeropt\headnumberwidth
+                    \ifzeropt\headtextwidth \else
+                        \headnumberwidth\dimexpr\headwidth-\headtextwidth\relax
+                    \fi
+                \else
+                    \ifzeropt\headtextwidth
+                        \headtextwidth\dimexpr\headwidth-\headnumberwidth\relax
+                    \fi
+                \fi
+                \hsize\headwidth
+            \fi
+            \ifzeropt\headnumberwidth \else
+                \headnumberdistance\zeropoint
+            \fi
+            \setbox\scratchbox\hbox \ifzeropt\headnumberwidth\else to \headnumberwidth\fi{\headnumbercontent}
+            \scratchdimen\dimexpr\wd\scratchbox+\headnumberdistance\relax
+            \ifzeropt\headtextwidth \else
+                \hsize\dimexpr\scratchdimen+\headtextwidth\relax
+            \fi
+            \hangindent\scratchdimen
+            \hangafter \plusone
+            \noindent
+            \box\scratchbox
+            \hskip\headnumberdistance
+        \else
+            \ifzeropt\headtextwidth
+                \ifzeropt\headwidth \else
+                    \hsize\headwidth
+                \fi
+            \else
+                \hsize\headtextwidth
+            \fi
+            \noindent
+            \fakeheadnumbercontent % will also be done in the other ones (force consistency with numbered)
+        \fi
+        \headtextcontent
+    }
+\stopsetups
+
+\defineheadalternative
+  [\v!inmargin]
+  [\c!alternative=\v!vertical,
+   \c!renderingsetup=\??headrenderings:\v!inmargin]
+
+\startsetups[\??headrenderings:\v!inmargin]
+    \vbox {
+        \headsetupspacing
+        \dontleavehmode % in case there is no strut, else side effects with llap
+        \begstrut % use one \strut here!
+        \ifconditional\headshownumber
+            \doifelsesomething {\headparameter\c!location} {
+                % kind of new
+                \margindata [\headparameter\c!location] {
+                    \headnumbercontent
+                }
+            } {
+                % normal backward compatible variant
+                \llap {
+                    \signalrightpage
+                    \hbox {
+                        \hfill
+                        \headnumbercontent
+                        \doifelserightpage{
+                            \scratchdistance\leftmargindistance
+                        } {
+                            \scratchdistance\rightmargindistance
+                        }
+                        \hskip\dimexpr\d_strc_rendering_local_leftoffset+\scratchdistance\relax
+                    }
+                }
+            }
+        \else
+            \fakeheadnumbercontent % will also be done in the other ones (force consistency with numbered)
+        \fi
+        \headtextcontent
+    }
+\stopsetups
+
+\defineheadalternative
+  [\v!margin]
+  [\v!inmargin]
+
+% \startsetups[\??headrenderings:\v!vertical:\v!margin]
+%     \directsetup{\??headrenderings:\v!vertical:\v!inmargin}
+% \stopsetups
+
+%D This one is for head based numbering usage: foo 1.2 and so:
+
+\defineheadalternative
+  [\v!reverse]
+  [\c!alternative=\v!vertical,
+   \c!renderingsetup=\??headrenderings:\v!reverse]
+
+\startsetups[\??headrenderings:\v!reverse]
+    \vbox {
+        \headsetupspacing
+        \noindent
+        \begstrut
+        \setfalse\headisdisplay % so a kind of mix
+        \headtextcontent
+        \ifconditional\headshownumber
+            \kern\headnumberdistance
+            \headnumbercontent
+        \else
+            \fakeheadnumbercontent
+        \fi
+        \endstrut
+    }
+\stopsetups
+
+\defineheadalternative
+  [\v!middle]
+  [\c!alternative=\v!vertical,
+   \c!renderingsetup=\??headrenderings:\v!middle]
+
+\startsetups[\??headrenderings:\v!middle]
+    \vbox {
+        \headsetupspacing
+        \veryraggedcenter
+        \enforced\let\\\endgraf
+        \enforced\let\crlf\endgraf
+        \ifconditional\headshownumber
+            \strut
+            \headnumbercontent
+            \par
+        \else
+            \fakeheadnumbercontent
+        \fi
+        \begstrut
+        \headtextcontent
+        \endstrut
+    }
+\stopsetups
+
+\defineheadalternative
+  [\v!text]
+  [\c!alternative=\v!horizontal,
+   \c!renderingsetup=\??headrenderings:\v!text]
+
+\startsetups[\??headrenderings:\v!text]
+    \begingroup
+    \headsetupspacing % no stretch in distance
+    \ifconditional\headshownumber
+        \headnumbercontent
+        \kern\headnumberdistance
+    \fi
+    \begstrut
+    \headtextcontent
+    \endstrut
+    \endgroup
+\stopsetups
+
+% onder/boven lijnt het nummer op de onderste/bovenste regel uit van een meerregelige kop
+
+\defineheadalternative
+  [\v!bottom]
+  [\c!alternative=\v!vertical,
+   \c!renderingsetup=\??headrenderings:\v!bottom]
+
+\startsetups[\??headrenderings:\v!bottom]
+    \ifconditional\headshownumber
+        \setbox\scratchboxone\hbox {
+            \headnumbercontent
+        }
+        \setbox\scratchboxtwo\vbox {
+            \headsetupspacing
+            \advance\hsize-\wd\scratchboxone\relax
+            \headtextcontent
+        }
+        \hpack {
+            \box\scratchboxone
+            \hskip\headnumberdistance
+            \box\scratchboxtwo
+        }
+    \else
+        \vbox {
+            \headsetupspacing
+            \noindent
+            \headtextcontent
+        }
+    \fi
+\stopsetups
+
+\defineheadalternative
+  [\v!top]
+  [\c!alternative=\v!vertical,
+   \c!renderingsetup=\??headrenderings:\v!top]
+
+\startsetups[\??headrenderings:\v!top]
+    \ifconditional\headshownumber
+        \setbox\scratchboxone\hbox {
+            \headnumbercontent
+        }
+        \setbox\scratchboxtwo\vtop {
+            \headsetupspacing
+            \advance\hsize-\wd\scratchboxone\relax
+            \headtextcontent
+        }
+        \hpack {
+            \box\scratchboxone
+            \hskip\headnumberdistance
+            \box\scratchboxtwo
+        }
+    \else
+        \vtop{
+            \headsetupspacing
+            \noindent
+            \headtextcontent
+        }
+    \fi
+\stopsetups
+
+% see typo-mar.mkiv:
+%
+% \defineheadalternative
+%   [\v!margintext]
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/strc-syn.mkxl b/tex/context/base/mkiv/strc-syn.mkxl
index 337f1d71a..d658e5467 100644
--- a/tex/context/base/mkiv/strc-syn.mkxl
+++ b/tex/context/base/mkiv/strc-syn.mkxl
@@ -240,8 +240,8 @@
    \else
      \frozen\instance\setuvalue{#1}{\definesynonym[\v!yes][#1]}% \name
    \fi
-   \ifnum\lastarguments>\plustwo
-     \protected\frozen\instance\def#3##1{\strc_synonyms_insert_meaning{#1}{##1}}% \meaning
+   \ifparameter#3\or
+     \frozen\instance\protected\def#3##1{\strc_synonyms_insert_meaning{#1}{##1}}% \meaning
    \fi
    \edef\currentsynonym{#1}%
    %
diff --git a/tex/context/base/mkiv/strc-tag.lmt b/tex/context/base/mkiv/strc-tag.lmt
new file mode 100644
index 000000000..11049abe0
--- /dev/null
+++ b/tex/context/base/mkiv/strc-tag.lmt
@@ -0,0 +1,615 @@
+if not modules then modules = { } end modules ['strc-tag'] = {
+    version   = 1.001,
+    comment   = "companion to strc-tag.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+-- This is rather experimental code. Tagging happens on the fly and there are two analysers
+-- involved: the pdf backend tagger and the exporter. They share data but there are subtle
+-- differences. Each tag carries a specification and these can be accessed by attribute (the
+-- end of the chain tag) or by so called fullname which is a tagname combined with a number.
+
+local type, next = type, next
+local insert, remove, unpack, concat, merge = table.insert, table.remove, table.unpack, table.concat, table.merge
+local find, topattern, format = string.find, string.topattern, string.format
+local lpegmatch, P, S, C, Cc = lpeg.match, lpeg.P, lpeg.S, lpeg.C, lpeg.Cc
+local allocate = utilities.storage.allocate
+local settings_to_hash = utilities.parsers.settings_to_hash
+local setmetatableindex = table.setmetatableindex
+
+local trace_tags = false  trackers.register("structures.tags", function(v) trace_tags = v end)
+
+local report_tags = logs.reporter("structure","tags")
+
+local attributes      = attributes
+local structures      = structures
+local implement       = interfaces.implement
+
+local a_tagged        = attributes.private('tagged')
+
+local unsetvalue      = attributes.unsetvalue
+local codeinjections  = backends.codeinjections
+
+local texgetattribute = tex.getattribute
+local texsetattribute = tex.setattribute
+
+local taglist         = allocate() -- access by attribute
+local specifications  = allocate() -- access by fulltag
+local labels          = allocate()
+local stack           = { }
+local chain           = { }
+local ids             = { }
+local enabled         = false
+local tagcontext      = { }
+local tagpatterns     = { }
+local lasttags        = { }
+local stacksize       = 0
+local metadata        = nil -- applied to the next element
+local documentdata    = { }
+local extradata       = false
+
+local tags            = structures.tags
+tags.taglist          = taglist -- can best be hidden
+tags.labels           = labels
+tags.patterns         = tagpatterns
+tags.specifications   = specifications
+
+function tags.current()
+    if stacksize > 0 then
+        return stack[stacksize] -- maybe copy or proxy
+    end
+end
+
+-- Tags are internally stored as:
+--
+-- tag>number tag>number tag>number
+
+local p_splitter     = C((1-S(">"))^1) * P(">") * C(P(1)^1)
+tagpatterns.splitter = p_splitter
+
+local properties     = allocate { -- todo: more "record = true" to improve formatting
+
+    document              = { pdf = "Div",        nature = "display" },
+
+    division              = { pdf = "Div",        nature = "display" },
+    paragraph             = { pdf = "P",          nature = "mixed"   },
+    p                     = { pdf = "P",          nature = "mixed"   },
+    construct             = { pdf = "Span",       nature = "inline"  },
+    highlight             = { pdf = "Span",       nature = "inline"  },
+
+    section               = { pdf = "Sect",       nature = "display" },
+    sectioncaption        = { pdf = "Div",        nature = "display", record = true },
+    sectiontitle          = { pdf = "H",          nature = "mixed"   },
+    sectionnumber         = { pdf = "H",          nature = "mixed"   },
+    sectioncontent        = { pdf = "Div",        nature = "display" },
+
+    itemgroup             = { pdf = "L",          nature = "display" },
+    item                  = { pdf = "LI",         nature = "display" },
+    itemtag               = { pdf = "Lbl",        nature = "mixed"   },
+    itemcontent           = { pdf = "LBody",      nature = "mixed"   },
+    itemhead              = { pdf = "Div",        nature = "display" },
+    itembody              = { pdf = "Div",        nature = "display" },
+
+    description           = { pdf = "Div",        nature = "display" },
+    descriptiontag        = { pdf = "Div",        nature = "mixed"   },
+    descriptioncontent    = { pdf = "Div",        nature = "mixed"   },
+    descriptionsymbol     = { pdf = "Span",       nature = "inline"  }, -- note reference
+
+    verbatimblock         = { pdf = "Code",       nature = "display" },
+    verbatimlines         = { pdf = "Code",       nature = "display" },
+    verbatimline          = { pdf = "Code",       nature = "mixed"   },
+    verbatim              = { pdf = "Code",       nature = "inline"  },
+
+    lines                 = { pdf = "Code",       nature = "display" },
+    line                  = { pdf = "Code",       nature = "mixed"   },
+    linenumber            = { pdf = "Span",       nature = "inline"   },
+
+    synonym               = { pdf = "Span",       nature = "inline"  },
+    sorting               = { pdf = "Span",       nature = "inline"  },
+
+    register              = { pdf = "Div",        nature = "display" },
+    registerlocation      = { pdf = "Span",       nature = "inline"  },
+    registersection       = { pdf = "Div",        nature = "display" },
+    registertag           = { pdf = "Span",       nature = "mixed"   },
+    registerentries       = { pdf = "Div",        nature = "display" },
+    registerentry         = { pdf = "Div",        nature = "display" },
+    registercontent       = { pdf = "Span",       nature = "mixed"   },
+    registersee           = { pdf = "Span",       nature = "mixed"   },
+    registerpages         = { pdf = "Span",       nature = "mixed"   },
+    registerpage          = { pdf = "Span",       nature = "mixed"   },
+    registerseparator     = { pdf = "Span",       nature = "inline"  },
+    registerpagerange     = { pdf = "Span",       nature = "mixed"   },
+
+    table                 = { pdf = "Table",      nature = "display" },
+    tablerow              = { pdf = "TR",         nature = "display" },
+    tablecell             = { pdf = "TD",         nature = "mixed"   },
+    tableheadcell         = { pdf = "TH",         nature = "mixed"   },
+    tablehead             = { pdf = "THEAD",      nature = "display" },
+    tablebody             = { pdf = "TBODY",      nature = "display" },
+    tablefoot             = { pdf = "TFOOT",      nature = "display" },
+
+    tabulate              = { pdf = "Table",      nature = "display" },
+    tabulaterow           = { pdf = "TR",         nature = "display" },
+    tabulatecell          = { pdf = "TD",         nature = "mixed"   },
+    tabulateheadcell      = { pdf = "TH",         nature = "mixed"   },
+    tabulatehead          = { pdf = "THEAD",      nature = "display" },
+    tabulatebody          = { pdf = "TBODY",      nature = "display" },
+    tabulatefoot          = { pdf = "TFOOT",      nature = "display" },
+
+    list                  = { pdf = "TOC",        nature = "display" },
+    listitem              = { pdf = "TOCI",       nature = "display" },
+    listtag               = { pdf = "Lbl",        nature = "mixed"   },
+    listcontent           = { pdf = "P",          nature = "mixed"   },
+    listdata              = { pdf = "P",          nature = "mixed"   },
+    listpage              = { pdf = "Reference",  nature = "mixed"   },
+    listtext              = { pdf = "Span",       nature = "inline"  },
+
+    delimitedblock        = { pdf = "BlockQuote", nature = "display" },
+    delimited             = { pdf = "Quote",      nature = "inline"  },
+    delimitedcontent      = { pdf = "Span",       nature = "inline"  },
+    delimitedsymbol       = { pdf = "Span",       nature = "inline"  },
+    subsentence           = { pdf = "Span",       nature = "inline"  },
+    subsentencecontent    = { pdf = "Span",       nature = "inline"  },
+    subsentencesymbol     = { pdf = "Span",       nature = "inline"  },
+
+    label                 = { pdf = "Span",       nature = "mixed"   },
+    number                = { pdf = "Span",       nature = "mixed"   },
+
+    float                 = { pdf = "Div",        nature = "display" }, -- Figure
+    floatcaption          = { pdf = "Caption",    nature = "mixed"   },
+    floatlabel            = { pdf = "Span",       nature = "inline"  },
+    floatnumber           = { pdf = "Span",       nature = "inline"  },
+    floattext             = { pdf = "Span",       nature = "mixed"   },
+    floatcontent          = { pdf = "P",          nature = "mixed"   },
+
+    image                 = { pdf = "P",          nature = "mixed"   },
+    mpgraphic             = { pdf = "P",          nature = "mixed"   },
+
+    formulaset            = { pdf = "Div",        nature = "display" },
+    formula               = { pdf = "Div",        nature = "display" }, -- Formula
+    formulacaption        = { pdf = "Span",       nature = "mixed"   },
+    formulalabel          = { pdf = "Span",       nature = "mixed"   },
+    formulanumber         = { pdf = "Span",       nature = "mixed"   },
+    formulacontent        = { pdf = "P",          nature = "display" },
+    subformula            = { pdf = "Div",        nature = "display" },
+
+    link                  = { pdf = "Link",       nature = "inline"  },
+    reference             = { pdf = "Span",       nature = "inline"  },
+
+    margintextblock       = { pdf = "Span",       nature = "inline"  },
+    margintext            = { pdf = "Span",       nature = "inline"  },
+    marginanchor          = { pdf = "Span",       nature = "inline"  },
+
+    math                  = { pdf = "Div",        nature = "inline"  }, -- no display
+    mn                    = { pdf = "Span",       nature = "mixed"   },
+    mi                    = { pdf = "Span",       nature = "mixed"   },
+    mo                    = { pdf = "Span",       nature = "mixed"   },
+    ms                    = { pdf = "Span",       nature = "mixed"   },
+    mrow                  = { pdf = "Span",       nature = "display" },
+    msubsup               = { pdf = "Span",       nature = "display" },
+    msub                  = { pdf = "Span",       nature = "display" },
+    msup                  = { pdf = "Span",       nature = "display" },
+    merror                = { pdf = "Span",       nature = "mixed"   },
+    munderover            = { pdf = "Span",       nature = "display" },
+    munder                = { pdf = "Span",       nature = "display" },
+    mover                 = { pdf = "Span",       nature = "display" },
+    mtext                 = { pdf = "Span",       nature = "mixed"   },
+    mfrac                 = { pdf = "Span",       nature = "display" },
+    mroot                 = { pdf = "Span",       nature = "display" },
+    msqrt                 = { pdf = "Span",       nature = "display" },
+    mfenced               = { pdf = "Span",       nature = "display" },
+    maction               = { pdf = "Span",       nature = "display" },
+
+    mstacker              = { pdf = "Span",       nature = "display" }, -- these are only internally used
+    mstackertop           = { pdf = "Span",       nature = "display" }, -- these are only internally used
+    mstackerbot           = { pdf = "Span",       nature = "display" }, -- these are only internally used
+    mstackermid           = { pdf = "Span",       nature = "display" }, -- these are only internally used
+
+    mtable                = { pdf = "Table",      nature = "display" }, -- might change
+    mtr                   = { pdf = "TR",         nature = "display" }, -- might change
+    mtd                   = { pdf = "TD",         nature = "display" }, -- might change
+
+    ignore                = { pdf = "Span",       nature = "mixed"   }, -- used internally
+    private               = { pdf = "Span",       nature = "mixed"   }, -- for users (like LS) when they need it
+    metadata              = { pdf = "Div",        nature = "display" },
+    metavariable          = { pdf = "Span",       nature = "mixed"   },
+
+    mid                   = { pdf = "Span",       nature = "inline"  },
+    sub                   = { pdf = "Span",       nature = "inline"  },
+    sup                   = { pdf = "Span",       nature = "inline"  },
+    subsup                = { pdf = "Span",       nature = "inline"  },
+
+    combination           = { pdf = "Span",       nature = "display" },
+    combinationpair       = { pdf = "Span",       nature = "display" },
+    combinationcontent    = { pdf = "Span",       nature = "mixed"   },
+    combinationcaption    = { pdf = "Span",       nature = "mixed"   },
+
+    publications          = { pdf = "Div",        nature = "display" },
+    publication           = { pdf = "Div",        nature = "mixed"   },
+    pubfld                = { pdf = "Span",       nature = "inline"  },
+
+    block                 = { pdf = "Div",        nature = "display"  },
+    userdata              = { pdf = "Div",        nature = "display"  },
+
+}
+
+tags.properties = properties
+
+local patterns = setmetatableindex(function(t,tag)
+    local v = topattern("^" .. tag .. ">")
+    t[tag] = v
+    return v
+end)
+
+function tags.locatedtag(tag)
+    local attribute = texgetattribute(a_tagged)
+    if attribute >= 0 then
+        local specification = taglist[attribute]
+        if specification then
+            local taglist = specification.taglist
+            local pattern = patterns[tag]
+            for i=#taglist,1,-1 do
+                local t = taglist[i]
+                if find(t,pattern) then
+                    return t
+                end
+            end
+        end
+    else
+        -- enabled but not auto
+    end
+    return false -- handy as bogus index
+end
+
+function structures.atlocation(str)
+    local specification = taglist[texgetattribute(a_tagged)]
+    if specification then
+        if list then
+            local taglist = specification.taglist
+            local pattern = patterns[str]
+            for i=#list,1,-1 do
+                if find(list[i],pattern) then
+                    return true
+                end
+            end
+        end
+    end
+end
+
+function tags.setproperty(tag,key,value)
+    local p = properties[tag]
+    if p then
+        p[key] = value
+    else
+        properties[tag] = { [key] = value }
+    end
+end
+
+function tags.setaspect(key,value)
+    local tag = chain[stacksize]
+    if tag then
+        local p = properties[tag]
+        if p then
+            p[key] = value
+        else
+            properties[tag] = { [key] = value }
+        end
+    end
+end
+
+function tags.registermetadata(data)
+    local d = settings_to_hash(data)
+    if #chain > 1 then
+        if metadata then
+            merge(metadata,d)
+        else
+            metadata = d
+        end
+    else
+        merge(documentdata,d)
+    end
+end
+
+function tags.getmetadata()
+    return documentdata or { }
+end
+
+function tags.registerextradata(name,serializer)
+    if type(serializer) == "function" then
+        if extradata then
+            extradata[name] = serializer
+        else
+            extradata = { [name] = serializer }
+        end
+    end
+end
+
+function tags.getextradata()
+    return extradata
+end
+
+function tags.start(tag,specification)
+    if not enabled then
+        codeinjections.enabletags()
+        enabled = true
+    end
+    --
+    labels[tag] = tag -- can go away
+    --
+    local attribute = #taglist + 1
+    local tagindex  = (ids[tag] or 0) + 1
+    --
+    local completetag = tag .. ">" .. tagindex
+    --
+    ids[tag]      = tagindex
+    lasttags[tag] = tagindex
+    stacksize     = stacksize + 1
+    --
+    chain[stacksize] = completetag
+    stack[stacksize] = attribute
+    tagcontext[tag]  = completetag
+    --
+    local tagnesting = { unpack(chain,1,stacksize) } -- a copy so we can add actualtext
+    --
+    if specification then
+        specification.attribute = attribute
+        specification.tagindex  = tagindex
+        specification.taglist   = tagnesting
+        specification.tagname   = tag
+        if metadata then
+            specification.metadata = metadata
+            metadata = nil
+        end
+        local userdata = specification.userdata
+        if userdata == "" then
+            specification.userdata = nil
+        elseif type(userdata) == "string"  then
+            specification.userdata = settings_to_hash(userdata)
+        end
+        local detail = specification.detail
+        if detail == "" then
+            specification.detail = nil
+        end
+        local parents = specification.parents
+        if parents == "" then
+            specification.parents = nil
+        end
+    else
+        specification = {
+            attribute = attribute,
+            tagindex  = tagindex,
+            taglist   = tagnesting,
+            tagname   = tag,
+            metadata  = metadata,
+        }
+        metadata = nil
+    end
+    --
+    taglist[attribute]          = specification
+    specifications[completetag] = specification
+    --
+    if completetag == "document>1" then
+        specification.metadata = documentdata
+    end
+    --
+    texsetattribute(a_tagged,attribute)
+    return attribute
+end
+
+function tags.restart(attribute)
+    stacksize = stacksize + 1
+    if type(attribute) == "number" then
+        local taglist = taglist[attribute].taglist
+        chain[stacksize] = taglist[#taglist]
+    else
+        chain[stacksize] = attribute -- a string
+        attribute = #taglist + 1
+        taglist[attribute] = { taglist = { unpack(chain,1,stacksize) } }
+    end
+    stack[stacksize] = attribute
+    texsetattribute(a_tagged,attribute)
+    return attribute
+end
+
+function tags.stop()
+    if stacksize > 0 then
+        stacksize = stacksize - 1
+    end
+    local t = stack[stacksize]
+    if not t then
+        if trace_tags then
+            report_tags("ignoring end tag, previous chain: %s",stacksize > 0 and concat(chain," ",1,stacksize) or "none")
+        end
+        t = unsetvalue
+    end
+    texsetattribute(a_tagged,t)
+    return t
+end
+
+function tags.getid(tag,detail)
+    return ids[tag] or "?"
+end
+
+function tags.last(tag)
+    return lasttags[tag] -- or false
+end
+
+function tags.lastinchain(tag)
+    if tag and tag ~= "" then
+        return tagcontext[tag]
+    else
+        return chain[stacksize]
+    end
+end
+
+local strip = C((1-S(">"))^1)
+
+function tags.elementtag()
+    local fulltag = chain[stacksize]
+    if fulltag then
+        return lpegmatch(strip,fulltag)
+    end
+end
+
+function tags.strip(fulltag)
+    return lpegmatch(strip,fulltag)
+end
+
+function tags.setuserproperties(tag,list)
+    if not list or list == "" then
+        tag, list = chain[stacksize], tag
+    else
+        tag = tagcontext[tag]
+    end
+    if tag then -- an attribute now
+        local l = settings_to_hash(list)
+        local s = specifications[tag]
+        if s then
+            local u = s.userdata
+            if u then
+                for k, v in next, l do
+                    u[k] = v
+                end
+            else
+                s.userdata = l
+            end
+        else
+           -- error
+        end
+    end
+end
+
+function tags.handler(head)  -- we need a dummy
+    return head, false
+end
+
+statistics.register("structure elements", function()
+    if enabled then
+        if stacksize > 0 then
+            return format("%s element chains identified, open chain: %s ",#taglist,concat(chain," => ",1,stacksize))
+        else
+            return format("%s element chains identified",#taglist)
+        end
+    end
+end)
+
+directives.register("backend.addtags", function(v)
+    if not enabled then
+        codeinjections.enabletags()
+        enabled = true
+    end
+end)
+
+-- interface
+
+local starttag = tags.start
+
+implement {
+    name      = "strc_tags_start",
+    public    = true,
+    protected = true,
+    actions   = starttag,
+    arguments = "argument",
+}
+
+implement {
+    name      = "strc_tags_stop",
+    public    = true,
+    protected = true,
+    actions   = tags.stop,
+}
+
+implement {
+    name      = "strc_tags_start_userdata",
+    public    = true,
+    protected = true,
+    actions   = function(tag,userdata) starttag(tag,{ userdata = userdata }) end,
+    arguments = { "optional", "optional" },
+}
+
+implement {
+    name      = "strc_tags_start_detail",
+    public    = true,
+    protected = true,
+    actions   = function(tag,detail) starttag(tag,{ detail = detail }) end,
+    arguments = "2 arguments",
+}
+
+implement {
+    name      = "strc_tags_start_ignore",
+    public    = true,
+    protected = true,
+    actions   = function(detail) starttag("ignore",{ detail = detail }) end,
+    arguments = { "argument" },
+}
+
+implement {
+    name      = "strc_tags_start_chained",
+    public    = true,
+    protected = true,
+    actions   = function(tag,detail,parents) starttag(tag,{ detail = detail, parents = parents }) end,
+    arguments = "3 arguments",
+}
+
+implement {
+    name      = "strc_tags_set_aspect",
+    public    = true,
+    protected = true,
+    actions   = tags.setaspect,
+    arguments = "2 arguments"
+}
+
+implement {
+    name      = "settagproperty",
+    actions   = tags.setproperty,
+    arguments = "3 arguments"
+}
+
+implement {
+    name      = "setelementbackendtag",
+    public    = true,
+    protected = true,
+    actions   = tags.setproperty,
+    arguments = { "optional", "'backend'", "optional" },
+}
+
+implement {
+    name      = "setelementnature",
+    public    = true,
+    protected = true,
+    actions   = tags.setproperty,
+    arguments = { "optional", "'nature'",  "optional" },
+}
+
+implement {
+    name      = "strc_tags_get_element_tag",
+    public    = true,
+    protected = true,
+    actions   = { tags.elementtag, context }
+}
+
+implement {
+    name      = "strc_tags_set_element_user_properties",
+    public    = true,
+    protected = true,
+    actions   = tags.setuserproperties,
+    arguments = { "optional", "optional" },
+}
+
+implement {
+    name      = "doifelseinelement",
+    public    = true,
+    protected = true,
+    actions   = { structures.atlocation, commands.testcase },
+    arguments = "argument",
+}
+
+implement {
+    name      = "settaggedmetadata",
+    public    = true,
+    protected = true,
+    actions   = tags.registermetadata,
+    arguments = "optional",
+}
diff --git a/tex/context/base/mkiv/strc-tag.mkxl b/tex/context/base/mkiv/strc-tag.mkxl
new file mode 100644
index 000000000..ebe1f4c2f
--- /dev/null
+++ b/tex/context/base/mkiv/strc-tag.mkxl
@@ -0,0 +1,531 @@
+%D \module
+%D   [       file=strc-tag,
+%D        version=2010.07.16,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Tags,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+% labels: no language needed
+% key/values and other names might change (and probably will)
+
+\writestatus{loading}{ConTeXt Structure Macros / Tags}
+
+\registerctxluafile{strc-tag}{autosuffix}
+
+\unprotect
+
+%D Eventually these labels will either move to the modules where they're used, or
+%D they will en dup in mult-tag.
+
+\definetagconstant{document}               % Div
+
+\definetagconstant{division}               % Div
+\definetagconstant{paragraph}              % P
+\definetagconstant{p}                      % P
+\definetagconstant{construct}              % Span
+\definetagconstant{highlight}              % Span
+
+\definetagconstant{section}                % Sect
+\definetagconstant{sectioncaption}         % Div
+\definetagconstant{sectiontitle}           % H
+\definetagconstant{sectionnumber}          % H
+\definetagconstant{sectioncontent}         % Div
+
+\definetagconstant{itemgroup}              % L
+\definetagconstant{item}                   % Li
+\definetagconstant{itemtag}                % Lbl
+\definetagconstant{itemcontent}            % LBody
+\definetagconstant{itemhead}               % Div
+\definetagconstant{itembody}               % Div
+
+\definetagconstant{description}            % Li
+\definetagconstant{descriptiontag}         % Lbl
+\definetagconstant{descriptioncontent}     % LBody
+\definetagconstant{descriptionsymbol}      % Span
+
+\aliastagconstant{construction}       {description}
+\aliastagconstant{constructiontag}    {descriptiontag}
+\aliastagconstant{constructioncontent}{descriptioncontent}
+\aliastagconstant{constructionsymbol} {descriptionsymbol}
+
+\definetagconstant{verbatimblock}          % Code
+\definetagconstant{verbatimlines}          % Code
+\definetagconstant{verbatimline}           % Code
+\definetagconstant{verbatim}               % Code
+
+\definetagconstant{lines}                  % Code
+\definetagconstant{line}                   % Code
+\definetagconstant{linenumber}             % Span
+
+\definetagconstant{sorting}                % Span
+\definetagconstant{synonym}                % Span
+
+\definetagconstant{register}               % Div
+\definetagconstant{registerlocation}       % Span
+\definetagconstant{registersection}        % Div
+\definetagconstant{registertag}            % Span
+\definetagconstant{registerentries}        % Div
+\definetagconstant{registerentry}          % Span
+\definetagconstant{registercontent}        % Span
+\definetagconstant{registersee}            % Span
+\definetagconstant{registerpages}          % Span
+\definetagconstant{registerpage}           % Span
+\definetagconstant{registerpagerange}      % Span
+\definetagconstant{registerfrompage}       % Span
+\definetagconstant{registertopage}         % Span
+\definetagconstant{registerseparator}      % Span
+
+\definetagconstant{table}                  % Table
+\definetagconstant{tablerow}               % TR
+\definetagconstant{tablecell}              % TD
+\definetagconstant{tableheadcell}          % TH
+\definetagconstant{tablehead}              % THEAD
+\definetagconstant{tablebody}              % TBODY
+\definetagconstant{tablefoot}              % TFOOT
+
+\definetagconstant{tabulate}               % Table
+\definetagconstant{tabulaterow}            % TR
+\definetagconstant{tabulatecell}           % TD
+\definetagconstant{tabulateheadcell}       % TH
+\definetagconstant{tabulatehead}           % THEAD
+\definetagconstant{tabulatebody}           % TBODY
+\definetagconstant{tabulatefoot}           % TFOOT
+
+\definetagconstant{math}                   % math
+\definetagconstant{mtable}                 % Table
+\definetagconstant{mtr}                    % TR
+\definetagconstant{mtd}                    % TD
+\definetagconstant{maction}                %
+\definetagconstant{mstacker}
+\definetagconstant{mstackertop}
+\definetagconstant{mstackermid}
+\definetagconstant{mstackerbot}
+
+\aliastagconstant{mtablerow} {mtr}
+\aliastagconstant{mtablecell}{mtd}
+
+\definetagconstant{munderover}             % special cases
+\definetagconstant{munder}                 % special cases
+\definetagconstant{mover}                  % special cases
+
+\definetagconstant{list}                   % TOC
+\definetagconstant{listitem}               % TOCI
+\definetagconstant{listtag}                % Lbl
+\definetagconstant{listcontent}            % P
+\definetagconstant{listdata}               % P
+\definetagconstant{listpage}               % Reference
+\definetagconstant{listtext}               % Span
+
+\definetagconstant{delimited}              % BlockQuote
+%definetagconstant{delimited}              % Quote
+\definetagconstant{delimitedsymbol}        % Span
+\definetagconstant{delimitedcontent}       % Span
+
+\aliastagconstant{delimitedblock}{delimited}
+
+\definetagconstant{subsentence}            % Span
+\definetagconstant{subsentencecontent}     % Span
+\definetagconstant{subsentencesymbol}      % Span
+
+\definetagconstant{float}                  % Div
+\definetagconstant{floatcaption}           % Caption
+\definetagconstant{floatlabel}             % Span
+\definetagconstant{floattext}              % Span
+\definetagconstant{floatnumber}            % Span
+\definetagconstant{floatcontent}           % P
+
+\definetagconstant{image}                  % P
+
+\definetagconstant{mpgraphic}              % P
+
+\definetagconstant{formulaset}             % Div
+\definetagconstant{formula}                % Div
+\definetagconstant{formulacaption}         % Span
+\definetagconstant{formulalabel}           % Span
+\definetagconstant{formulanumber}          % P
+\definetagconstant{formulacontent}         % P
+\definetagconstant{subformula}             % Div
+
+\definetagconstant{link}                   % Link
+\definetagconstant{reference}              % Span
+
+\definetagconstant{margintext}             % Span
+\definetagconstant{margintextblock}        % Div
+\definetagconstant{marginanchor}           % Span
+
+% we might opt for verbose variants so this is experimental:
+
+\definetagconstant{label}                  % Span
+\definetagconstant{number}                 % Span
+
+\definetagconstant{ignore}                 % Span
+\definetagconstant{private}                % Span
+
+\definetagconstant{mid}                    % Span
+\definetagconstant{sub}                    % Span
+\definetagconstant{sup}                    % Span
+\definetagconstant{subsup}                 % Span
+
+\definetagconstant{unit}                   % Span
+\definetagconstant{quantity}               % Span
+%definetagconstant{number}                 % Span
+
+\definetagconstant{combination}            % Span
+\definetagconstant{combinationpair}        % Span
+\definetagconstant{combinationcontent}     % Span
+\definetagconstant{combinationcaption}     % Span
+
+\definetagconstant{publications}           % Span
+\definetagconstant{publication}            % Span
+\definetagconstant{pubfld}                 % Span
+
+\definetagconstant{block}                  % Div
+\definetagconstant{userdata}               % Div
+
+% \setuptaglabeltext
+%   [en]
+%   [\t!document=document]
+
+% the real code
+
+\definesystemattribute[tagged][public]
+\definesystemattribute[image] [public]
+
+% \setelementbackendtag [#1][#2] % define at the lua end
+% \setelementnature     [#1][#2] % define at the lua end
+
+\permanent\protected\def\ignoretagsinexport[#1]{\clf_ignoretagsinexport{#1}} % todo: public implementor
+
+\installcorenamespace{tagging}
+
+\installsetuponlycommandhandler \??tagging {tagging}
+
+\def\strc_tags_report_hyphen#1%
+  {\writestatus\m!languages{setting #1 to U+00AD}}
+
+\protected\def\strc_tags_patch_hyphen
+  {% for the moment here
+   \ifnum\languageparameter\s!lefthyphenchar>\zerocount
+     \setuplanguage[\s!default][\s!lefthyphenchar="AD]%
+     \strc_tags_report_hyphen\s!lefthyphenchar
+   \fi
+   \ifnum\languageparameter\s!righthyphenchar>\zerocount
+     \setuplanguage[\s!default][\s!righthyphenchar="AD]%
+     \strc_tags_report_hyphen\s!righthyphenchar
+   \fi
+   \let\strc_tags_report_hyphen\gobbleoneargument}
+
+% It makes no sense to have labels ... maybe some day as a last 'replace' in the export
+% which might be more efficient then ... okay, we now cannot overload but who cares.
+
+% \strc_tags_start_userdata              % defined at the lua end
+% \strc_tags_stop                        % defined at the lua end
+% \strc_tags_set_aspect                  % defined at the lua end
+% \strc_tags_get_element_tag             % defined at the lua end
+% \strc_tags_set_element_user_properties % defined at the lua end
+
+\permanent\protected\def\strc_tags_element_start_yes
+  {\iftrialtypesetting
+     \expandafter\gobbletwooptionals
+   \else
+     \expandafter\strc_tags_start_userdata
+   \fi}
+
+\permanent\protected\def\strc_tags_element_stop_yes
+  {\iftrialtypesetting
+     % nothing
+   \else
+     \expandafter\strc_tags_stop
+   \fi}
+
+\protected\def\strc_tags_enable_elements
+  {\strc_tags_patch_hyphen
+   \enforced\let\startelement    \strc_tags_element_start_yes
+   \enforced\let\stopelement     \strc_tags_element_stop_yes
+   \enforced\let\dosettagproperty\strc_tags_set_aspect}
+
+\protected\def\strc_tags_disable_elements
+  {\enforced\let\startelement    \gobbletwooptionals
+   \enforced\let\stopelement     \relax
+   \enforced\let\dosettagproperty\gobbletwoarguments}
+
+% beware: making these unexpanded spoils tables (noalign problem)
+
+\def\strc_tags_enabled_start_no_detail
+  {\iftrialtypesetting
+     \expandafter\gobbleoneargument
+   \else
+     \expandafter\strc_tags_start
+   \fi}
+
+\def\strc_tags_enabled_start_detail
+  {\iftrialtypesetting
+     \expandafter\gobbletwoarguments
+   \else
+     \expandafter\strc_tags_start_detail
+   \fi}
+
+\def\strc_tags_enabled_start_chained
+  {\iftrialtypesetting
+     \expandafter\gobblethreearguments
+   \else
+     \expandafter\strc_tags_start_chained_indeed
+   \fi}
+
+\def\strc_tags_enabled_start_ignore
+  {\iftrialtypesetting
+     \expandafter\gobbleoneargument
+   \else
+     \expandafter\strc_tags_start_ignore
+   \fi}
+
+\def\strc_tags_enabled_stop
+  {\iftrialtypesetting
+     % do nothing
+   \else
+     \expandafter\strc_tags_stop
+  \fi}
+
+\def\strc_tags_start_chained_indeed#1#2#3{\strc_tags_start_chained{#1}{#2}{\getcurrentparentchain#3{#2}}}
+
+\newconditional\c_strc_tags_enabled
+
+\permanent\let\dotaggedplaceholder\empty
+
+\immutable\chardef\strc_tags_placeholder_char\zerocount % "FFFC
+
+\protected\def\strc_tags_enable_indeed
+  {\enforced\let\dotaggedplaceholder  \strc_tags_placeholder_char
+   \enforced\let\dostarttagged        \strc_tags_enabled_start_detail
+   \enforced\let\dostarttaggednodetail\strc_tags_enabled_start_no_detail
+   \enforced\let\dostarttaggedchained \strc_tags_enabled_start_chained
+   \enforced\let\dostoptagged         \strc_tags_enabled_stop
+   \enforced\let\dostartignoretagging \strc_tags_enabled_start_ignore
+   \enforced\let\dostopignoretagging  \strc_tags_stop}
+
+\protected\def\strc_tags_enable
+  {% once enable one is toast
+   \global\settrue\c_strc_tags_enabled
+   % and gets:
+   \strc_tags_enable_indeed}
+
+\protected\def\strc_tags_disable
+  {\ifconditional\c_strc_tags_enabled
+     % so now all are artifacts
+     \enforced\let\dotaggedplaceholder  \strc_tags_placeholder_char
+     \enforced\let\dostarttagged        \gobbletwoarguments
+     \enforced\let\dostarttaggednodetail\gobbleoneargument
+     \enforced\let\dostarttaggedchained \gobblethreearguments
+     \enforced\let\dostoptagged         \donothing
+   \else
+     % initial
+     \enforced\let\dotaggedplaceholder  \empty
+     \enforced\let\dostarttagged        \gobbletwoarguments
+     \enforced\let\dostarttaggednodetail\gobbleoneargument
+     \enforced\let\dostarttaggedchained \gobblethreearguments
+     \enforced\let\dostoptagged         \donothing
+     \enforced\let\dostartignoretagging \donothing
+     \enforced\let\dostopignoretagging  \donothing
+   \fi}
+
+% for luigi (beware: fully expandable):
+
+\protected\def\strc_tags_setup_element_user_properties
+  {\iftrialtypesetting
+     \expandafter\gobbletwooptionals
+   \else
+     \expandafterstrc_set_element_user_properties
+   \fi}
+
+\protected\def\strc_tags_enable_properties
+  {\let\getelementtag             \strc_tags_get_element_tag
+   \let\setupelementuserproperties\strc_tags_set_element_user_properties}
+
+\protected\def\strc_tags_disable_properties
+  {\let\getelementtag             \donothing
+   \let\setupelementuserproperties\gobbletwooptionals}
+
+%D The triggers:
+
+\newtoks\everyenableelements
+\newtoks\everydisableelements
+
+\appendtoks
+    \strc_tags_enable_elements
+    \strc_tags_enable_properties
+    \doifelse{\taggingparameter\c!method}\v!auto\strc_tags_enable\strc_tags_disable
+\to \everyenableelements
+
+\appendtoks
+    \strc_tags_disable_elements
+    \strc_tags_disable_properties
+    \strc_tags_disable
+\to \everydisableelements
+
+\appendtoks
+   \doifelse{\taggingparameter\c!state}\v!start{\the\everyenableelements}{\the\everydisableelements}%
+\to \everysetuptagging
+
+\permanent\protected\def\forgettagging
+  {\c_attr_tagged\attributeunsetvalue}
+
+\setuptagging
+  [\c!state=\v!stop,
+   \c!method=\v!auto]
+
+% Cf suggestion by Wolfgang we now have named paragraphs. Watch out, the content
+% is grouped but only when we have an instance.
+%
+% \defineparagraph[red] [color=red]
+% \defineparagraph[bold][style=bold]
+%
+% \startparagraph       \input ward \stopparagraph
+% \startparagraph[red]  \input ward \stopparagraph
+% \startparagraph[bold] \input ward \stopparagraph
+
+\installcorenamespace               {paragraph}
+\installcommandhandler \??paragraph {paragraph} \??paragraph
+
+\setupparagraph % someday maybe also strut (beg/end) and align
+  [\c!color=,
+   \c!style=]
+
+\ifdefined\dotagparagraph \else \let\dotagparagraph\gobbleoneargument \fi
+
+\permanent\tolerant\protected\def\startparagraph[#1]#*[#2]%
+  {\endgraf % we end before the group
+   \begingroup
+   \ifarguments
+     \let\currentparagraph\empty
+   \or
+     \ifhastok={#1}%
+       \let\currentparagraph\empty
+       \setupcurrentparagraph[#1]
+     \else
+       \edef\currentparagraph{#1}%
+     \fi
+   \or
+     \edef\currentparagraph{#1}%
+     \setupcurrentparagraph[#2]%
+   \fi
+   \useparagraphstyleandcolor\c!style\c!color
+   \usealignparameter\paragraphparameter
+   \usesetupsparameter\paragraphparameter
+   \dostarttagged\t!paragraph\currentparagraph
+   \dotagparagraph{\paragraphparameter\c!align}}
+
+\permanent\protected\def\stopparagraph
+  {\dostoptagged
+   \endgraf % we end inside the group
+   \endgroup}
+
+\aliased\let\startpar\startparagraph
+\aliased\let\stoppar \stopparagraph
+
+\def\strc_tags_document_start_indeed
+  {\glet\strc_tags_document_start_indeed\relax
+   \dostarttagged\t!document\empty}
+
+\def\strc_tags_document_stop_indeed
+  {\glet\strc_tags_document_stop_indeed\relax
+   \dostoptagged}
+
+\appendtoks
+    \strc_tags_document_start_indeed % here because otherwise products don't get a root (starttext before env)
+\to \everyenableelements
+
+% \appendtoks
+%     \strc_tags_document_start_indeed
+% \to \everystarttext
+
+\appendtoks
+    \strc_tags_document_stop_indeed
+\to \everystoptext
+
+\appendtoks
+    \strc_tags_disable_elements
+    \strc_tags_disable
+\to \everybeforepagebody
+
+% This doesn't work well either, so instead we handle the ornaments in the tagging
+% in a different way (see attr -> false code).
+
+% \appendtoks
+%     \dostartignoretagging
+% \to \everybeforepagebody
+%
+% \appendtoks
+%     \dostopignoretagging
+% \to \everyafterpagebody
+
+% \doifelseinelement{structure:section}            {yes} {no}
+% \doifelseinelement{structure:chapter}            {yes} {no}
+% \doifelseinelement{division:*-structure:chapter} {yes} {no}
+
+\aliased\let\doifinelementelse\doifelseinelement % define at the lua end
+
+\permanent\protected\def\taggedlabeltexts#1#2#3% experimental: label, numberdetail, numbercontent
+  {\begingroup
+   \dostarttagged\t!label{#1}%
+   \labeltexts{#1}%
+     {\dostoptagged
+      \dostarttagged\t!number{#2}%
+      #3%
+      \dostoptagged
+      \dostarttagged\t!label{#1}}%
+   \dostoptagged
+   \endgroup}
+
+\permanent\protected\def\namedtaggedlabeltexts#1#2#3#4#5% experimental: labeltag label numbertag numberdetail numbercontent
+  {\begingroup
+   \dostarttagged{#1}{#2}%
+   \labeltexts{#2}%
+     {\dostoptagged
+      \dostarttagged{#3}{#4}%
+      #5%
+      \dostoptagged
+      \dostarttagged{#1}{#2}}%
+   \dostoptagged
+   \endgroup}
+
+%D Metadata is added after the following structure element so here we get some as
+%D child of the document root and some as child of the chapter element.
+%D
+%D \settaggedmetadata[title=Hello World!,author=Hans Hagen]
+%D
+%D \starttyping
+%D \starttext
+%D   \startelement[ignore]
+%D     \input tufte
+%D   \stopelement
+%D   \par \input ward \par
+%D   \settaggedmetadata[whatever=Again and Again]
+%D   \startchapter[title=test]
+%D     \input ward
+%D   \stopchapter
+%D \stoptext
+%D \stoptyping
+
+% \settaggedmetadata[#1] % define at the lua end
+
+%D An overload:
+
+\pushoverloadmode
+
+\aliased\let\strc_tagged_saved_bpar\bpar
+\aliased\let\strc_tagged_saved_epar\epar
+
+\enforced\permanent\protected\def\bpar{\dostarttagged\t!paragraph\empty\strc_tagged_saved_bpar}
+\enforced\permanent\protected\def\epar{\strc_tagged_saved_epar\dostoptagged}
+
+\popoverloadmode
+
+% \permanent\def\untagged{attr \taggedattribute\attributeunsetvalue}
+
+\protect
diff --git a/tex/context/base/mkiv/strc-tnt.mkxl b/tex/context/base/mkiv/strc-tnt.mkxl
new file mode 100644
index 000000000..4129117f0
--- /dev/null
+++ b/tex/context/base/mkiv/strc-tnt.mkxl
@@ -0,0 +1,117 @@
+%D \module
+%D   [       file=strc-tnt,
+%D        version=2019.05.30, % based on older code
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Text Notes,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\unprotect
+
+%D \macros
+%D   {definetextnote,setuptextnote}
+%D
+%D \startbuffer
+%D \definetextnote
+%D   [textnote]
+%D
+%D \startbuffer
+%D Test test test \textnote [n=5] {alpha}. test test test test tets test test
+%D \textnote [n=10] {beta}. Test test test test tets test test \textnote [n=12]
+%D {gamma}. Test test test test tets test test \textnote [n=24] {delta}. Test test
+%D test test test test \textnote {epsilon} test test \textnote [n=*] {zeta}.
+%D \stopbuffer
+%D
+%D \blank {\setuptextnote[empty=yes]    \getbuffer\par} \blank
+%D \blank {\setuptextnote[empty=number] \getbuffer\par} \blank
+%D \blank {\setuptextnote[empty=none]   \getbuffer\par} \blank
+%D \blank {                             \getbuffer\par} \blank
+%D
+%D \blank[2*big]
+%D
+%D \placenotes[textnote:note][criterium=text]
+%D \stopbuffer
+%D
+%D \typebuffer \getbuffer
+
+\installcorenamespace{textnote}
+
+\installcommandhandler \??textnote {textnote} \??textnote
+
+\definebar
+  [\v!textnote:\v!underbar]
+  [\v!underbar]
+
+\definenote
+  [\v!textnote:\v!note]
+
+\setuptextnote
+  [\c!rule=\v!textnote:\v!underbar,
+   \c!note=\v!textnote:\v!note,
+   \c!n=10] % * will use the real space
+
+\appendtoks
+    \frozen\instance\setuevalue{\currenttextnote}{\educ_textnote[\currenttextnote]}%
+\to \everydefinetextnote
+
+\tolerant\protected\def\educ_textnote[#1]#*[#2]#:#3%
+  {\dontleavehmode
+   \begingroup
+   \def\currenttextnote{#1}%
+   \ifparameter#2\or\setupcurrenttextnote[#2]\fi
+   \edef\p_n{\textnoteparameter\c!n}%
+   \edef\p_empty{\textnoteparameter\c!empty}%
+   \edef\currentbar{\textnoteparameter\c!rule}%
+   \edef\currentnote{\textnoteparameter\c!note}%
+   \ifx\p_n\wildcardsymbol
+     \donefalse
+     \ifx\p_empty\v!yes
+       \donetrue
+     \orelse\ifx\p_empty\v!number
+       \donetrue
+     \orelse\ifx\p_empty\v!none
+       \donetrue
+     \fi
+     \ifdone
+       \setupbar[\currentbar][\c!empty=\v!yes]%
+     \fi
+     \inlinebar[\currentbar]\bgroup
+       \wordboundary#3%
+       \ifx\p_empty\v!yes
+         \setnotetext[\currentnote]{#3}%
+       \orelse\ifx\p_empty\v!number
+         \runninghbox{\resetbar\setnote[\currentnote]{#3}}%
+       \orelse\ifx\p_empty\v!none
+         \setupnote[\currentnote][\c!location=\v!none]%
+         \runninghbox{\resetbar\setnote[\currentnote]{#3}}%
+       \fi
+     \egroup
+   \else
+     \inlinebar[\currentbar]\bgroup
+       \scratchcounter\numexpr\p_n/\plustwo\relax
+       \ifx\p_empty\v!yes
+         \interwordspacesbefore\scratchcounter
+         \setnotetext[\currentnote]{#3}%
+         \interwordspacesafter\scratchcounter
+       \orelse\ifx\p_empty\v!number
+         \interwordspacesbefore\scratchcounter
+         \zwnj\runninghbox{\resetbar\setnote[\currentnote]{#3}}\zwnj
+         \interwordspacesafter\scratchcounter
+       \orelse\ifx\p_empty\v!none
+         \setupnote[\currentnote][\c!location=\v!none]%
+         \interwordspacesbefore\scratchcounter
+         \zwnj\runninghbox{\resetbar\setnote[\currentnote]{#3}}\zwnj
+         \interwordspacesafter\scratchcounter
+       \else
+          #3%
+       \fi
+     \egroup
+   \fi
+   \endgroup}
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/strc-usr.mkxl b/tex/context/base/mkiv/strc-usr.mkxl
new file mode 100644
index 000000000..28d398194
--- /dev/null
+++ b/tex/context/base/mkiv/strc-usr.mkxl
@@ -0,0 +1,169 @@
+%D \module
+%D   [       file=strc-bkm,
+%D        version=2009.04.01,
+%D          title=\CONTEXT\ Structure Macros,
+%D       subtitle=Bookmarks,
+%D         author=Wolfgang Schuster,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Structure Macros / Userdata}
+
+\registerctxluafile{strc-usr}{}
+
+%D It's a bit like blocks that also use buffers but more lightweight and with
+%D inplace settings.
+%D
+%D \starttyping
+%D \defineuserdata [test] [style=italic]
+%D
+%D \samplefile{klein}
+%D
+%D \startuserdata [before=\blank,after=\blank,color=red]
+%D     \samplefile{greenfield}
+%D \stopuserdata
+%D
+%D \samplefile{sapolsky}
+%D
+%D \startuserdata [test]
+%D     \samplefile{bryson}
+%D \stopuserdata
+%D
+%D \samplefile{jojomayer}
+%D
+%D \startuserdata [test] [before=\blank,after=\blank,color=red]
+%D     \samplefile{linden}
+%D \stopuserdata
+%D
+%D \samplefile{montgomery}
+%D \stoptyping
+%D
+%D Or from \LUA:
+%D
+%D \starttyping
+%D \startluacode
+%D     context.startuserdata({color="blue"})
+%D         context.samplefile("klein")
+%D     context.stopuserdata()
+%D \stopluacode
+%D \stoptyping
+%D
+%D An example of an alternative:
+%D
+%D \starttyping
+%D \defineuserdataalternative [epigraph] [renderingsetup=userdata:epigraph]
+%D
+%D \startsetups [userdata:epigraph]
+%D     \startframedtext [location=right,frame=off,align={flushleft,broad},style=\tfx,offset=.25ex,width=.5\textwidth]
+%D         \begstrut\inlinebuffer[userdata]\endstrut
+%D         \hairline
+%D         \wordright{\userdataparameter{author}}
+%D     \stopframedtext
+%D \stopsetups
+%D
+%D \defineuserdata
+%D   [epigraph]
+%D   [alternative=epigraph]
+%D
+%D \startuserdata [epigraph] [author={Sean B. Carrol}]
+%D     The fraction of fossil olfactory receptor genes is significantly higher in
+%D     all species with full color vision. This suggests that the evolution of
+%D     trichromatic vision --- which allows these primates to detect food, mates,
+%D     and danger with visual cues --- has reduced their reliance on the sense of
+%D     smell.
+%D \stopuserdata
+%D
+%D \startuserdata [epigraph] [author={Sean B. Carrol}]
+%D     \samplefile{carrol}
+%D \stopuserdata
+%D \stoptyping
+
+\unprotect
+
+\installnamespace {userdata}
+\installnamespace {userdataalternative}
+\installnamespace {userdatarenderings}
+
+\installcommandhandler \????userdata            {userdata}            \????userdata
+\installcommandhandler \????userdataalternative {userdataalternative} \????userdataalternative
+
+\permanent\protected\def\startuserdata
+  {\begingroup
+   \let\currentuserdata\empty
+   \doifelsenextoptionalcs\userdata_start_delayed\userdata_start_indeed}
+
+% This variant works only when the userdata instance exists while the assignment check
+% can also be used with undefined instances which falls back to the global settings.
+%
+% \def\userdata_start_delayed[#1]%
+%   {\ifcsname\nameduserdatahash{\detokenize\expandafter{\normalexpanded{#1}}}\s!parent\endcsname
+%      \expandafter\userdata_start_delayed_name
+%    \else
+%      \expandafter\userdata_start_delayed_parameters
+%    \fi[#1]}
+
+\def\userdata_start_delayed[#1]%
+  {\doifelseassignmentcs{#1}%
+     \userdata_start_delayed_parameters
+     \userdata_start_delayed_name
+   [#1]}
+
+\def\userdata_start_delayed_parameters[#1]%
+  {\setupcurrentuserdata[#1]%
+   \userdata_start_indeed}
+
+\def\userdata_start_delayed_name[#1]%
+  {\edef\currentuserdata{#1}%
+   \checkuserdataparent
+   \doifelsenextoptionalcs\userdata_start_delayed_parameters\userdata_start_indeed}
+
+\def\userdata_start_indeed
+  {\grabbufferdatadirect\s!userdata{\csstring\startuserdata}{\csstring\stopuserdata}}
+
+\permanent\protected\def\stopuserdata
+  {\userdataparameter\c!before % HH: moved, so we obey the outer spacing
+   \dostarttagged\t!userdata\currentuserdata % HH: added, maybe move up ?
+   \begingroup
+   \useuserdatastyleandcolor\c!style\c!color
+   \usealignparameter\userdataparameter % HH: added
+   \edef\currentuserdataalternative{\userdataparameter\c!alternative}%
+   \ifcsname\currentuserdataalternativehash\s!parent\endcsname \else
+     \let\currentuserdataalternative\s!default
+   \fi
+   \usesetupsparameter\userdataparameter
+   \edef\p_renderingsetup{\userdataalternativeparameter\c!renderingsetup}%
+   \directsetup\p_renderingsetup
+   \endgroup
+   \dostoptagged
+   \userdataparameter\c!after % HH: moved
+   \endgroup}
+
+\permanent\protected\def\getuserdata
+  {\getbufferdata[\s!userdata]}
+
+\permanent\protected\def\getinlineuserdata
+  {\inlinebuffer[\s!userdata]}
+
+\defineuserdataalternative
+  [\s!default]
+  [\c!renderingsetup=\????userdatarenderings:\s!default]
+
+% \startsetups[\????userdatarenderings:\s!default]
+%     \userdataparameter\c!before
+%     \usesetupsparameter\userdataparameter
+%     \getbufferdata[\s!userdata]
+%     \userdataparameter\c!after
+% \stopsetups
+
+\startsetups[\????userdatarenderings:\s!default]
+    \getuserdata
+\stopsetups
+
+\setupuserdata
+  [\c!alternative=\s!default]
+
+\protect
diff --git a/tex/context/base/mkiv/supp-box.lmt b/tex/context/base/mkiv/supp-box.lmt
index 8a308f90f..41013da9a 100644
--- a/tex/context/base/mkiv/supp-box.lmt
+++ b/tex/context/base/mkiv/supp-box.lmt
@@ -71,6 +71,7 @@ local setshift      = nuts.setshift
 local setsplit      = nuts.setsplit
 local setattrlist   = nuts.setattrlist
 local setwhd        = nuts.setwhd
+local setglue       = nuts.setglue
 
 local flush_node    = nuts.flush_node
 local flush_list    = nuts.flush_list
@@ -85,6 +86,7 @@ local traverse      = nuts.traverse
 local free          = nuts.free
 local findtail      = nuts.tail
 local reverse       = nuts.reverse
+local effective_glue= nuts.effective_glue
 
 local nextdisc      = nuts.traversers.disc
 local nextdir       = nuts.traversers.dir
@@ -769,7 +771,8 @@ local function limitate(t) -- don't pack the result !
     end
     local left  = t.left or 0
     local right = t.right or 0
-    if left + right < width then
+    local total = left + right
+    if total < width then
         local last     = nil
         local first    = nil
         local maxleft  = left
@@ -828,6 +831,16 @@ local function limitate(t) -- don't pack the result !
     end
     setlist(text)
     free(text)
+
+    if t.freeze then
+        local l = hpack(list,total,"exactly")
+        for n in traverse_id(glue_code,list) do
+            setglue(n,(effective_glue(n,l)))
+        end
+        setlist(l)
+        flush_node(l)
+    end
+
     return tonode(list)
 end
 
@@ -842,6 +855,7 @@ implement {
             { "text",     "hbox" },
             { "sentinel", "hbox" },
             { "strip",    "boolean" },
+            { "freeze",   "boolean" },
         }
     },
     actions   = function(t)
diff --git a/tex/context/base/mkiv/syst-aux.mkxl b/tex/context/base/mkiv/syst-aux.mkxl
index d3e75fd07..8847cb6b1 100644
--- a/tex/context/base/mkiv/syst-aux.mkxl
+++ b/tex/context/base/mkiv/syst-aux.mkxl
@@ -93,48 +93,20 @@
 
 \def\normalspace{ }
 
-%D \macros
-%D   {!!count, !!toks, !!dimen, !!box,
-%D    !!width, !!height, !!depth, !!string, !!done}
-%D
-%D We define some more \COUNTERS\ and \DIMENSIONS. We also define some shortcuts to
-%D the local scatchregisters~0, 2, 4, 6 and~8. These are kind of obsolete and
-%D eventually they might get dropped!
-
-\newcount\!!counta \newtoks\!!toksa \newdimen\!!dimena \newbox\!!boxa
-\newcount\!!countb \newtoks\!!toksb \newdimen\!!dimenb \newbox\!!boxb
-\newcount\!!countc \newtoks\!!toksc \newdimen\!!dimenc \newbox\!!boxc
-\newcount\!!countd \newtoks\!!toksd \newdimen\!!dimend \newbox\!!boxd
-\newcount\!!counte \newtoks\!!tokse \newdimen\!!dimene \newbox\!!boxe
-\newcount\!!countf \newtoks\!!toksf \newdimen\!!dimenf \newbox\!!boxf
-                                    \newdimen\!!dimeng
-                                    \newdimen\!!dimenh
-                                    \newdimen\!!dimeni
-                                    \newdimen\!!dimenj
-                                    \newdimen\!!dimenk
-
-\let\!!stringa\empty \let\!!stringb\empty \let\!!stringc\empty
-\let\!!stringd\empty \let\!!stringe\empty \let\!!stringf\empty
-
-\newdimen\!!widtha \newdimen\!!heighta \newdimen\!!deptha
-\newdimen\!!widthb \newdimen\!!heightb \newdimen\!!depthb
-\newdimen\!!widthc \newdimen\!!heightc \newdimen\!!depthc
-\newdimen\!!widthd \newdimen\!!heightd \newdimen\!!depthd
-
-\newif\if!!donea   \newif\if!!doneb    \newif\if!!donec
-\newif\if!!doned   \newif\if!!donee    \newif\if!!donef
-
-\def\!!zerocount {0} % alongside \zerocount
-\def\!!minusone {-1} % ...
-\def\!!plusone   {1} % ...
-\def\!!plustwo   {2} % ...
-\def\!!plusthree {3} % ...
-\def\!!plusfour  {4} % ...
-\def\!!plusfive  {5} % ...
-\def\!!plussix   {6} % ...
-\def\!!plusseven {7} % ...
-\def\!!pluseight {8} % ...
-\def\!!plusnine  {9} % alongside \plusnine
+\newif\if!!donea   \newif\if!!doneb    \newif\if!!donec  % soon obsolete in lmtx
+\newif\if!!doned   \newif\if!!donee    \newif\if!!donef  % soon obsolete in lmtx
+
+\immutable\def\!!zerocount {0} % alongside \zerocount
+\immutable\def\!!minusone {-1} % ...
+\immutable\def\!!plusone   {1} % ...
+\immutable\def\!!plustwo   {2} % ...
+\immutable\def\!!plusthree {3} % ...
+\immutable\def\!!plusfour  {4} % ...
+\immutable\def\!!plusfive  {5} % ...
+\immutable\def\!!plussix   {6} % ...
+\immutable\def\!!plusseven {7} % ...
+\immutable\def\!!pluseight {8} % ...
+\immutable\def\!!plusnine  {9} % alongside \plusnine
 
 \setnewconstant   \uprotationangle    0
 \setnewconstant\rightrotationangle   90
@@ -819,8 +791,8 @@
      \expandafter\syst_helpers_process_comma_item_gobble
    \fi}
 
-\def\syst_helpers_process_comma_item_next
-  {\expandafterspaces\syst_helpers_process_comma_item}
+% \def\syst_helpers_process_comma_item_next
+%   {\expandafterspaces\syst_helpers_process_comma_item}
 
 % \protected\def\processcommalist[#1]#2%
 %   {\pushmacro\commalistcommand
@@ -834,16 +806,37 @@
 %    \normalexpanded{\noexpand\expandafterspaces\syst_helpers_process_comma_item#1,}\ignorearguments\ignorearguments\ignorearguments
 %    \popmacro\commalistcommand}
 
-\permanent\protected\def\processcommalist[#*#+]#2%
+% \permanent\protected\def\processcommalist[#*#+]#2%
+%   {\pushmacro\commalistcommand
+%    \def\commalistcommand{#2}%
+%    \expandafterspaces\syst_helpers_process_comma_item#1,\ignorearguments\ignorearguments\ignorearguments
+%    \popmacro\commalistcommand}
+%
+% \permanent\protected\def\processcommacommand[#*#+]#2%
+%   {\pushmacro\commalistcommand
+%    \def\commalistcommand{#2}%
+%    \normalexpanded{\noexpand\expandafterspaces\syst_helpers_process_comma_item#1,}\ignorearguments\ignorearguments\ignorearguments
+%    \popmacro\commalistcommand}
+
+\tolerant\protected\def\syst_helpers_process_comma_item#*#1,%
+  {\ifarguments\or
+     \commalistcommand{#1}%
+     \expandafter\syst_helpers_process_comma_item_next
+   \fi}
+
+\def\syst_helpers_process_comma_item_next
+  {\expandafterspaces\syst_helpers_process_comma_item}
+
+\permanent\protected\def\processcommalist[#1]#2%
   {\pushmacro\commalistcommand
    \def\commalistcommand{#2}%
-   \expandafterspaces\syst_helpers_process_comma_item#1,\ignorearguments\ignorearguments\ignorearguments
+   \syst_helpers_process_comma_item#1\ignorearguments\ignorearguments\ignorearguments
    \popmacro\commalistcommand}
 
-\permanent\protected\def\processcommacommand[#*#+]#2%
+\permanent\protected\def\processcommacommand[#1]#2%
   {\pushmacro\commalistcommand
    \def\commalistcommand{#2}%
-   \normalexpanded{\noexpand\expandafterspaces\syst_helpers_process_comma_item#1,}\ignorearguments\ignorearguments\ignorearguments
+   \normalexpanded{\syst_helpers_process_comma_item#1}\ignorearguments\ignorearguments\ignorearguments
    \popmacro\commalistcommand}
 
 % \let\syst_helpers_process_comma_item_next_a                                                            \syst_helpers_process_comma_item_next
@@ -5376,23 +5369,31 @@
 %        \syst_helpers_process_separated_list_step}%
 %     \expandafter\syst_helpers_process_separated_list_step\gobbleoneargument#1#2]#2}
 
-\def\syst_helpers_process_separated_list#1]#*[#2]#3%
-   {\def\syst_helpers_process_separated_list_step##1##2#2%
-      {\def\m_syst_string_one{##2}% suggested by VZ
-       \if]##1%
-       \orelse\ifx\blankspace\m_syst_string_one
+% \def\syst_helpers_process_separated_list#1]#*[#2]#3%
+%    {\def\syst_helpers_process_separated_list_step##1##2#2%
+%       {\def\m_syst_string_one{##2}% suggested by VZ
+%        \if]##1%
+%        \orelse\ifx\blankspace\m_syst_string_one
+%          #3{##1}%
+%          \expandafter\syst_helpers_process_separated_list_step
+%        \orelse\if]##2%
+%        \else
+%          #3{##1##2}%
+%          \expandafter\syst_helpers_process_separated_list_step
+%        \fi
+%        }%
+%     \expandafter\syst_helpers_process_separated_list_step\gobbleoneargument#1#2]#2}
+
+% \permanent\protected\def\processseparatedlist[%
+%   {\syst_helpers_process_separated_list\relax}
+
+\permanent\protected\def\processseparatedlist[#+]#*[#2]#3%
+   {\tolerant\def\syst_helpers_process_separated_list_step##1#2%
+      {\ifarguments\or
          #3{##1}%
          \expandafter\syst_helpers_process_separated_list_step
-       \orelse\if]##2%
-       \else
-         #3{##1##2}%
-         \expandafter\syst_helpers_process_separated_list_step
-       \fi
-       }%
-    \expandafter\syst_helpers_process_separated_list_step\gobbleoneargument#1#2]#2}
-
-\permanent\protected\def\processseparatedlist[%
-  {\syst_helpers_process_separated_list\relax}
+       \fi}%
+    \syst_helpers_process_separated_list_step#1\ignorearguments\ignorearguments}
 
 %D \macros
 %D   {processlist}
@@ -6659,4 +6660,19 @@
      \ifflags#1=\protectedflagcode\etoksapp\scratchtoks{\ifdone \space\fi protected}\donetrue\fi
    \expandafter\endgroup\expandafter\endlocalcontrol\the\scratchtoks}
 
+%D \macros
+%D   {resetmacros}
+%D
+%D The next macro can be used to reset a macro:
+%D
+%D \starttyping
+%D \resetmacros[startfoo,\stopfoo]
+%D \stoptyping
+
+\permanent\protected\def\syst_reset_macro#1%
+  {\overloaded\letcsname\csstring#1\endcsname\undefined} % so only frozen (instances(
+
+\permanent\protected\def\resetmacros[#1]%
+  {\processcommalist[#1]\syst_reset_macro}
+
 \protect \endinput
diff --git a/tex/context/base/mkiv/syst-ini.mkxl b/tex/context/base/mkiv/syst-ini.mkxl
index 8cb2b8c1c..d495e12af 100644
--- a/tex/context/base/mkiv/syst-ini.mkxl
+++ b/tex/context/base/mkiv/syst-ini.mkxl
@@ -351,11 +351,10 @@
 
 % \permanent\protected\def\newattribute{\syst_basics_allocate\c_syst_last_allocated_attribute\attribute\attributedef\c_syst_max_allocated_register}
 
-%D Not used by \CONTEXT\ but for instance \PICTEX\ needs it. It's a trick to force
-%D strings instead of tokens that take more memory. It's a trick to trick to force
-%D strings. This macro is never used in \CONTEXT.
-
-\permanent\protected\def\newhelp#1#2{\newtoks#1#1\expandafter{\detokenize{#2}}}
+% %D Not used by \CONTEXT\ but for instance \PICTEX\ needs it. It's a trick to force
+% %D strings instead of tokens that take more memory.
+%
+% \permanent\protected\def\newhelp#1#2{\newtoks#1#1\expandafter{\detokenize{#2}}}
 
 %D \macros
 %D   {scratchcounter,
@@ -399,7 +398,7 @@
 %D \macros
 %D   {tempstring}
 
-\let\tempstring\empty
+\mutable\let\tempstring\empty
 
 %D \macros
 %D   {scratchwidth, scratchheight, scratchdepth, scratchoffset, scratchdistance}
@@ -607,6 +606,10 @@
 \newif\ifdone
 \newif\iffound
 
+\newif\ifscratchcondition
+\newif\ifscratchconditionone
+\newif\ifscratchconditiontwo
+
 \let\htdp\boxtotal
 
 %D A few shortcuts:
diff --git a/tex/context/base/mkiv/tabl-ltb.mkiv b/tex/context/base/mkiv/tabl-ltb.mkiv
index de90d6585..0650cf9ce 100644
--- a/tex/context/base/mkiv/tabl-ltb.mkiv
+++ b/tex/context/base/mkiv/tabl-ltb.mkiv
@@ -503,7 +503,7 @@
        \fi
        \global\d_tabl_lines_width\wd\b_tabl_lines_cell
        \tabl_lines_start_part
-       \if!!doneb \else \ifcase\c_tabl_lines_repeat \else
+       \if!!donea \else \ifcase\c_tabl_lines_repeat \else
          % check for left/right page
          \ifcase\c_tabl_lines_page\donetrue\or\donetrue\or\donefalse\fi\ifdone
            % insert repeater
diff --git a/tex/context/base/mkiv/tabl-ltb.mkxl b/tex/context/base/mkiv/tabl-ltb.mkxl
index 1ab2a2c4b..5058e26f8 100644
--- a/tex/context/base/mkiv/tabl-ltb.mkxl
+++ b/tex/context/base/mkiv/tabl-ltb.mkxl
@@ -445,7 +445,7 @@
      \fi
    \else
      \donefalse
-     \!!doneafalse
+     \scratchconditiononefalse
      \ifcase\c_tabl_lines_repeat\else
        % calculate ahead
        \ifnum\c_tabl_lines_repeat=\numexpr\c_tabl_lines_column-\plustwo\relax
@@ -453,7 +453,7 @@
        \fi
      \fi
      \ifdone
-       \!!doneatrue
+       \scratchconditiononetrue
        % collecting repeater
      \orelse\ifdim\d_tabl_lines_width>\hsize
        \donetrue
@@ -478,7 +478,7 @@
        \fi
        \global\d_tabl_lines_width\wd\b_tabl_lines_cell
        \tabl_lines_start_part
-       \if!!doneb \else \ifcase\c_tabl_lines_repeat \else
+       \ifscratchconditionone \else \ifcase\c_tabl_lines_repeat \else
          % check for left/right page
          \ifcase\c_tabl_lines_page\donetrue\or\donetrue\or\donefalse\fi\ifdone
            % insert repeater
diff --git a/tex/context/base/mkiv/tabl-mis.mkxl b/tex/context/base/mkiv/tabl-mis.mkxl
new file mode 100644
index 000000000..14bd08b46
--- /dev/null
+++ b/tex/context/base/mkiv/tabl-mis.mkxl
@@ -0,0 +1,294 @@
+%D \module
+%D   [       file=tabl-mis,
+%D        version=2012.06.28,
+%D          title=\CONTEXT\ Table Macros,
+%D       subtitle=Miscellaneous,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Table Macros / Miscellaneous}
+
+\unprotect
+
+%D \macros
+%D   {somekindoftab,kindoftabposition}
+%D
+%D This macro can be used to create tabs:
+%D
+%D \starttyping
+%D \setupheadertexts[{\somekindoftab[alternative=horizontal]{\framed{\kindoftabposition}}}]
+%D \setuptexttexts  [{\somekindoftab[alternative=vertical]  {\framed{\kindoftabposition}}}]
+%D
+%D \starttext
+%D     \showframe \dorecurse{10}{test\page}
+%D \stoptext
+%D \stoptyping
+%D
+%D (This rather old but updated code used to be in \type {core-mis.mkiv}.)
+
+\let\kindoftabposition\!!zerocount
+
+\permanent\tolerant\protected\def\somekindoftab[#1]%
+  {\bgroup
+   \getdummyparameters
+     [\c!alternative=\v!vertical,
+      \c!width=\textwidth,\c!height=\textheight,
+      \c!n=\lastpage,\c!m=\realpageno,
+      #1]%
+   \doifelse{\directdummyparameter\c!alternative}\v!vertical
+     {\typo_kindoftab_indeed\vbox\vskip\c!height}
+     {\typo_kindoftab_indeed\hbox\hskip\c!width }}
+
+\def\typo_kindoftab_indeed#1#2#3#4%
+  {#1 to \directdummyparameter#3 \bgroup
+     \forgetall
+     \scratchnx\directdummyparameter\c!n\relax
+     \scratchmx\directdummyparameter\c!m\relax
+     \edef\kindoftabposition{\the\scratchmx}%
+     \ifnum\scratchmx>\plusone
+       #2\zeropoint \s!plus \the\numexpr\scratchmx-\plusone  \relax\s!fill\relax
+     \fi
+     #4% can use \kindoftabposition
+     \ifnum\scratchmx<\scratchnx\relax
+       #2\zeropoint \s!plus \the\numexpr\scratchnx-\scratchmx\relax\s!fill\relax
+     \fi
+   \egroup
+   \egroup}
+
+%D The following paragraphs mechanism is probably one of the oldest of \CONTEXT\ and
+%D mostly served as a table mechanism capable of dealing with paragraphs. Nowadays
+%D one can also use tabulate or natural tables.
+%D
+%D \startbuffer
+%D \defineparagraphs[sample][n=2,rule=on]
+%D
+%D \startsample
+%D     first  \nextsample
+%D     second \nextsample
+%D     third
+%D \stopsample
+%D
+%D \startsample
+%D     \input tufte \nextsample
+%D     \input ward  \nextsample
+%D     \input davis \nextsample
+%D     \input zapf
+%D \stopsample
+%D
+%D \startparagraphs[sample]
+%D     first  \nextsample
+%D     second \nextsample
+%D     third
+%D \stopparagraphs
+%D
+%D \startparagraphs[sample]
+%D     \startparagraphscell
+%D         first
+%D     \stopparagraphscell
+%D     \startparagraphscell
+%D         second
+%D     \stopparagraphscell
+%D     \startparagraphscell
+%D         third
+%D     \stopparagraphscell
+%D \stopparagraphs
+%D \stopbuffer
+%D
+%D \typebuffer \getbuffer
+
+\installcorenamespace{paragraphs}
+
+\installframedcommandhandler \??paragraphs {paragraphs} \??paragraphs
+
+\setupparagraphs
+  [\c!n=3,
+   \c!offset=\zeropoint,
+   \c!before=\blank,
+   \c!after=\blank,
+   \c!distance=\emwidth,
+   \c!height=\v!fit,
+   \c!width=\availablehsize,
+   \c!rule=\v!off,
+   \c!command=,
+   \c!align=,
+   \c!tolerance=\v!tolerant, % obsolete
+   \c!rulethickness=\linewidth,
+   \c!rulecolor=,
+   \c!style=,
+   \c!color=,
+   \c!frame=\v!off,
+   \c!top=\vss,
+   \c!bottom=\vfill]
+
+\aliased\let\typo_paragraphs_setup_saved\setupparagraphs
+
+\overloaded\permanent\tolerant\protected\def\setupparagraphs[#1]#*[#2]#*[#3]% we are downward compatible with [each] and [1,3]
+  {\ifarguments\or
+      \typo_paragraphs_setup_saved[#1]%
+   \or
+      \typo_paragraphs_setup_saved[#1][#2]%
+   \or
+     \doifelse{#2}\v!each
+       {\dorecurse{\namedparagraphsparameter{#1}\c!n}%
+          {\normalexpanded{\typo_paragraphs_setup_saved[#1:\recurselevel]}[#3]}}%
+       {\def\typo_paragraphs_setup_step##1{\typo_paragraphs_setup_saved[#1:##1][#3]}%
+        \processcommalist[#2]\typo_paragraphs_setup_step}%
+   \fi}
+
+\appendtoks
+    \frozen\instance\letvalue{\e!next \currentparagraphs}\nextparagraphs
+    \frozen\instance\letvalue\currentparagraphs\nextparagraphs
+    \frozen\instance\setuevalue{\e!start\currentparagraphs}{\startparagraphs[\currentparagraphs]}%
+    \frozen\instance\letvalue{\e!stop \currentparagraphs}\stopparagraphs
+    %frozen\instance\setuevalue{\e!setup\currentparagraph\e!endsetup}{\typo_paragraphs_setup_saved[\currentparagraphs]}%
+    \dorecurse{\paragraphsparameter\c!n}
+      {\normalexpanded{\typo_paragraphs_setup_saved[\currentparagraphs:\recurselevel][\c!width=,\s!parent=\??paragraphs\currentparagraphs]}}%
+    \typo_paragraphs_setup_saved[\currentparagraphs:1][\c!distance=\zeropoint]%
+\to \everydefineparagraphs
+
+\newcount\c_typo_paragraphs_n
+\newcount\c_typo_paragraphs_max
+\newdimen\d_typo_paragraphs_width
+\newdimen\d_typo_paragraphs_auto
+
+\permanent\protected\def\startparagraphs[#1]% quite slow
+  {\bgroup % (1)
+   \edef\currentparagraphs{#1}%
+ % \paragraphsparameter\c!before
+   \edef\p_width{\paragraphsparameter\c!width}%
+   \ifempty\p_width
+     \d_typo_paragraphs_width\availablehsize
+   \else
+     \d_typo_paragraphs_width\p_width\relax
+   \fi
+   \advance\d_typo_paragraphs_width-2\dimexpr\paragraphsparameter\c!offset\relax
+   \c_typo_paragraphs_max\paragraphsparameter\c!n\relax
+   \d_typo_paragraphs_auto\d_typo_paragraphs_width\relax
+   \scratchcounter\zerocount
+   \dorecurse\c_typo_paragraphs_max
+     {\edef\p_width{\namedparagraphsparameter{\currentparagraphs:\recurselevel}\c!width}%
+      \ifempty\p_width
+        \advance\scratchcounter\plusone
+      \else
+        \advance\d_typo_paragraphs_auto-\p_width\relax
+      \fi
+      \ifnum\recurselevel>\plusone
+        \advance\d_typo_paragraphs_auto-\namedparagraphsparameter{\currentparagraphs:\recurselevel}\c!distance\relax
+      \fi}%
+   \ifnum\scratchcounter>\zerocount
+     \divide\d_typo_paragraphs_auto\scratchcounter
+   \else
+     \d_typo_paragraphs_auto\zeropoint
+   \fi
+   \parindent\zeropoint
+   \c_typo_paragraphs_n\zerocount
+   \enforced\let\\\typo_paragraphs_next % downward compatible
+   \edef\p_offset{\paragraphsparameter\c!offset}%
+   \doifelsedimension\p_offset
+     {\scratchoffset\p_offset}%
+     {\scratchoffset\zeropoint}%
+   \setbox\scratchbox\hpack
+   \bgroup % (2)
+   \forgetall
+   \advance\hsize-2\scratchoffset
+   \let\typo_paragraphs_start_cell\typo_paragraphs_start_cell_indeed
+   \let\typo_paragraphs_stop_cell \typo_paragraphs_stop_cell_indeed
+   \typo_paragraphs_start_cell_indeed}
+
+\permanent\protected\def\stopparagraphs
+  {\stopparagraphscell
+   \egroup  % (2)
+   \letparagraphsparameter\c!align\v!flushleft % normal
+   \paragraphsparameter\c!before
+   \dontleavehmode\inheritedparagraphsframed{\box\scratchbox}%
+   \paragraphsparameter\c!after
+   \egroup} % (1)
+
+\permanent\protected\def\nextparagraphs
+  {\stopparagraphscell
+   \startparagraphscell}
+
+\permanent\protected\def\startparagraphscell
+  {\typo_paragraphs_start_cell}
+
+\def\typo_paragraphs_start_cell_indeed
+  {\removeunwantedspaces
+   \advance\c_typo_paragraphs_n\plusone
+   \ifnum\c_typo_paragraphs_n>\c_typo_paragraphs_max
+     \expandafter\typo_paragraphs_start_cell_nop
+   \else
+     \expandafter\typo_paragraphs_start_cell_yes
+   \fi}
+
+\def\typo_paragraphs_start_cell_nop
+  {\begingroup
+   % message: too many cells in paragraphs
+   \let\typo_paragraphs_start_cell\relax
+   \let\typo_paragraphs_stop_cell\typo_paragraphs_stop_cell_indeed
+   \setbox\scratchbox\vbox\bgroup}
+
+\def\typo_paragraphs_start_cell_yes
+  {\begingroup
+   \let\typo_paragraphs_start_cell\relax
+   \let\typo_paragraphs_stop_cell\typo_paragraphs_stop_cell_indeed
+   \edef\currentparagraphs{\currentparagraphs:\the\c_typo_paragraphs_n}%
+   \ifnum\c_typo_paragraphs_n>\plusone
+     \typo_paragraphs_separator
+   \fi
+   \edef\p_height{\paragraphsparameter\c!height}%
+   \edef\p_width {\paragraphsparameter\c!width }%
+   \useparagraphsstyleandcolor\c!style\c!color
+   \setbox\scratchbox\vtop \ifempty\p_height \orelse\ifx\p_height\v!fit \else to \p_height \fi
+   \bgroup % (2)
+   \blank[\v!disable]%
+   \paragraphsparameter\c!top
+   \hsize\ifempty\p_width \d_typo_paragraphs_auto \else \p_width \fi \relax
+   \usealignparameter\paragraphsparameter
+   \paragraphsparameter\c!inner
+   \everypar{\begstrut\everypar\emptytoks}%
+   \ignorespaces
+   \paragraphsparameter\c!command}
+
+\permanent\protected\def\stopparagraphscell
+  {\typo_paragraphs_stop_cell
+   \let\typo_paragraphs_stop_cell\relax}
+
+\def\typo_paragraphs_stop_cell_indeed
+  {\ifnum\c_typo_paragraphs_n>\c_typo_paragraphs_max
+     \expandafter\typo_paragraphs_stop_cell_nop
+   \else
+     \expandafter\typo_paragraphs_stop_cell_yes
+   \fi}
+
+\def\typo_paragraphs_stop_cell_nop
+  {\egroup
+   \endgroup}
+
+\def\typo_paragraphs_stop_cell_yes
+  {\ifvmode
+     \removelastskip
+   \else
+     \removeunwantedspaces
+     \endstrut
+     \endgraf
+   \fi
+   \paragraphsparameter\c!bottom
+   \egroup % (2)
+   \dontleavehmode\hpack{\raise\strutheight\box\scratchbox}%
+   \endgroup}
+
+\def\typo_paragraphs_separator
+  {\scratchdistance\paragraphsparameter\c!distance
+   \doif{\paragraphsparameter\c!rule}\v!on
+     {\scratchwidth\paragraphsparameter\c!rulethickness
+      \scratchdistance\dimexpr(\scratchdistance-\scratchwidth)/2\relax
+      \hskip\scratchdistance
+      \color[\paragraphsparameter\c!rulecolor]{\vrule\s!width\scratchwidth}}%
+   \hskip\scratchdistance}
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/tabl-ntb.mkxl b/tex/context/base/mkiv/tabl-ntb.mkxl
index f47c67802..8883a29e3 100644
--- a/tex/context/base/mkiv/tabl-ntb.mkxl
+++ b/tex/context/base/mkiv/tabl-ntb.mkxl
@@ -1414,17 +1414,17 @@
 \def\tabl_ntb_pass_two#1 #2 % meer in cellD
   {\d_tabl_ntb_width\zeropoint
    \scratchcounter\c_tabl_ntb_col
-   \!!counta\tabl_ntb_get_col{#1}{#2}\relax
-   \ifcase\!!counta\or
+   \scratchcounterone\tabl_ntb_get_col{#1}{#2}\relax
+   \ifcase\scratchcounterone\or
      \advance\d_tabl_ntb_width\dimexpr
        \tabl_ntb_get_wid\scratchcounter
      \relax
      \advance\scratchcounter\plusone
    \else
-     \dorecurse\!!counta
+     \dorecurse\scratchcounterone
        {\advance\d_tabl_ntb_width\dimexpr
           \tabl_ntb_get_wid\scratchcounter
-          \ifnum\recurselevel<\!!counta
+          \ifnum\recurselevel<\scratchcounterone
             +\d_tabl_ntb_columndistance
             +\tabl_ntb_get_dis\scratchcounter
           \fi
@@ -1441,36 +1441,36 @@
 \def\tabl_ntb_pass_three#1 #2 %
   {% height
    \dostarttagged\t!tablecell\empty
-   \!!counta \tabl_ntb_get_col{#1}{#2}\relax
-   \!!countb \tabl_ntb_get_row{#1}{#2}\relax
-   \!!heighta\tabl_ntb_get_ht {#1}{#2}\relax
-   \tablecellcolumns\!!counta % used later so don't adapt these
-   \tablecellrows   \!!countb % used later so don't adapt these
+   \scratchcounterone\tabl_ntb_get_col{#1}{#2}\relax
+   \scratchcountertwo\tabl_ntb_get_row{#1}{#2}\relax
+   \scratchheight\tabl_ntb_get_ht {#1}{#2}\relax
+   \tablecellcolumns\scratchcounterone % used later so don't adapt these
+   \tablecellrows   \scratchcountertwo % used later so don't adapt these
    \d_tabl_ntb_height\zeropoint
-   \ifnum\!!counta=\c_tabl_ntb_maximum_col\relax
+   \ifnum\scratchcounterone=\c_tabl_ntb_maximum_col\relax
      % case: nc=maxcolumns
    \else
      \scratchcounter#1\relax
-     \dorecurse\!!countb
+     \dorecurse\scratchcountertwo
        {\advance\d_tabl_ntb_height\tabl_ntb_get_hei\scratchcounter
         \advance\scratchcounter\plusone}%
-     \ifdim\d_tabl_ntb_height<\!!heighta\relax
-       \d_tabl_ntb_height\!!heighta
+     \ifdim\d_tabl_ntb_height<\scratchheight\relax
+       \d_tabl_ntb_height\scratchheight
      \fi
    \fi
    % width
    \d_tabl_ntb_width\zeropoint
    \scratchcounter\c_tabl_ntb_col
-   \ifcase\!!counta\or
+   \ifcase\scratchcounterone\or
      \advance\d_tabl_ntb_width\dimexpr
        \tabl_ntb_get_wid\scratchcounter
      \relax
      \advance\scratchcounter\plusone
    \else
-     \dorecurse\!!counta
+     \dorecurse\scratchcounterone
        {\advance\d_tabl_ntb_width\dimexpr
           \tabl_ntb_get_wid\scratchcounter
-          \ifnum\recurselevel<\!!counta
+          \ifnum\recurselevel<\scratchcounterone
             +\d_tabl_ntb_columndistance
             +\tabl_ntb_get_dis\scratchcounter
           \fi
@@ -1482,7 +1482,7 @@
       \dotagTABLEsignal % maybe we need to add some packaging in this case
       \tabl_ntb_get_txt{#1}{#2}%
    \egroup
-   \ifnum\!!counta=\c_tabl_ntb_maximum_col\relax
+   \ifnum\scratchcounterone=\c_tabl_ntb_maximum_col\relax
      % case: nc=maxcolumns
    \else
      \scratchdimen\tabl_ntb_get_hei{#1}%
@@ -1491,11 +1491,11 @@
      \ht\scratchbox\scratchdimen
    \fi
    \dp\scratchbox\zeropoint
-   \edef\!!stringa{\tabl_ntb_get_ref{#1}{#2}}%
-   \ifempty\!!stringa
+   \edef\scratchmacro{\tabl_ntb_get_ref{#1}{#2}}%
+   \ifempty\scratchmacro
      \box\scratchbox
    \else
-     \normalexpanded{\noexpand\directgotobox{\box\scratchbox}[\!!stringa]}% to be checked
+     \normalexpanded{\directgotobox{\box\scratchbox}[\scratchmacro]}% to be checked
    \fi
    \dostoptagged} % right spot
 
@@ -1622,28 +1622,28 @@
 
 \def\tabl_ntb_stretch_widths % more variants, e.g. a max to \dimend
   {\ifcase\c_tabl_ntb_maximum_col\else % else division by zero
-     \!!dimend\zeropoint
-     \!!dimene\dimexpr
+     \scratchdimenfour\zeropoint
+     \scratchdimenfive\dimexpr
         \hsize
        -\d_tabl_ntb_leftmargindistance
        -\d_tabl_ntb_rightmargindistance
        +\d_tabl_ntb_columndistance
      \relax
      \dorecurse\c_tabl_ntb_maximum_col
-       {\advance\!!dimend\dimexpr
+       {\advance\scratchdimenfour\dimexpr
           \tabl_ntb_get_wid\recurselevel
         \relax
-        \advance\!!dimene\dimexpr
+        \advance\scratchdimenfive\dimexpr
           -\tabl_ntb_get_dis\recurselevel
           -\d_tabl_ntb_columndistance
         \relax}%
      \relax
      % distribute width (stretch)
-     \ifdim\!!dimend<\!!dimene
-       \advance\!!dimend-\!!dimene
-       \divide\!!dimend\c_tabl_ntb_maximum_col
+     \ifdim\scratchdimenfour<\scratchdimenfive
+       \advance\scratchdimenfour-\scratchdimenfive
+       \divide\scratchdimenfour\c_tabl_ntb_maximum_col
        \dorecurse\c_tabl_ntb_maximum_col
-         {\tabl_ntb_set_wid\recurselevel{\the\dimexpr\tabl_ntb_get_wid\recurselevel-\!!dimend\relax}}%
+         {\tabl_ntb_set_wid\recurselevel{\the\dimexpr\tabl_ntb_get_wid\recurselevel-\scratchdimenfour\relax}}%
      \fi
    \fi}
 
@@ -1683,26 +1683,26 @@
 
 \def\tabl_ntb_split_box
   {\resettsplit
-   \def\tsplitminimumfreelines{2}%
-   \def\tsplitminimumfreespace{\dimexpr\extratblsplitheight+\naturaltablelocalparameter\c!splitoffset\relax}%
-   \def\tsplitbeforeresult    {\beforeTABLEsplitbox}%
-   \def\tsplitafterresult     {\afterTABLEsplitbox}%
-   \def\tsplitafter           {\m_tabl_ntb_after_split}%
-   \def\tsplitbefore          {\m_tabl_ntb_before_split}% supported ?
-   \setbox\tsplitcontent\vbox{\tabl_ntb_flush_content}%
+   \c_split_minimum_free_lines\plustwo
+   \d_split_minimum_free_space\dimexpr\extratblsplitheight+\naturaltablelocalparameter\c!splitoffset\relax
+   \t_split_before_result{\beforeTABLEsplitbox}%
+   \t_split_after_result{\afterTABLEsplitbox}%
+   \t_split_after{\m_tabl_ntb_after_split}%
+   \t_split_before{\m_tabl_ntb_before_split}% not used (yet)
+   \setbox\b_split_content\vbox{\tabl_ntb_flush_content}%
    \ifmultipleTBLheads
      \dorecurse\c_tabl_ntb_n_of_head_lines
-       {\setbox\scratchbox\vsplit\tsplitcontent to \lineheight
-        \setbox\tsplithead\vbox{\unvcopy\tsplithead\unvcopy\scratchbox}}% \vpack ?
+       {\setbox\scratchbox\vsplit\b_split_content to \lineheight
+        \setbox\b_split_head\vbox{\unvcopy\b_split_head\unvcopy\scratchbox}}% \vpack ?
      \dorecurse\c_tabl_ntb_n_of_next_lines
-       {\setbox\scratchbox\vsplit\tsplitcontent to \lineheight
-        \setbox\tsplitnext\vbox{\unvcopy\tsplitnext\unvcopy\scratchbox}}% \vpack ?
+       {\setbox\scratchbox\vsplit\b_split_content to \lineheight
+        \setbox\b_split_next\vbox{\unvcopy\b_split_next\unvcopy\scratchbox}}% \vpack ?
    \fi
    \edef\p_spaceinbetween{\naturaltablelocalparameter\c!spaceinbetween}%
    \ifempty\p_spaceinbetween\else
      \blank[\p_spaceinbetween]%
    \fi
-   \def\postprocesstsplit{\postprocessTABLEsplitbox{\box\tsplitresult}}%
+   \def\postprocesstsplit{\postprocessTABLEsplitbox{\box\b_split_result}}%
    \handletsplit}
 
 % ! ! ! ! TODO: naast \postprocessTABLEsplitbox ook evt \postprocessTABLEbox voor niet split
@@ -1720,8 +1720,8 @@
 
 \def\tabl_ntb_check_widths_indeed#1%
   {\ifconditional\c_tabl_ntb_trace_widths\tabl_ntb_show_widths B#1\fi
-   \!!counta\zerocount
-   \!!dimena\dimexpr
+   \scratchcounterone\zerocount
+   \scratchdimenone\dimexpr
      \hsize
     -\d_tabl_ntb_leftmargindistance
     -\d_tabl_ntb_rightmargindistance
@@ -1729,38 +1729,38 @@
    \relax
    \dorecurse\c_tabl_ntb_maximum_col
      {\scratchdimen\tabl_ntb_get_aut\recurselevel\relax
-      \advance\!!dimena\dimexpr
+      \advance\scratchdimenone\dimexpr
         -\tabl_ntb_get_dis\recurselevel
         -\d_tabl_ntb_columndistance
       \relax
       \ifdim\scratchdimen>\zeropoint\relax
-        \advance\!!dimena -\scratchdimen
+        \advance\scratchdimenone -\scratchdimen
       \else
         \scratchdimen\tabl_ntb_get_wid\recurselevel\relax
         \ifdim\scratchdimen>\d_tabl_ntb_maxwidth\relax
           \ifcase#1\else\tabl_ntb_let_wid\recurselevel\zeropoint\fi
-          \advance\!!counta \plusone
+          \advance\scratchcounterone \plusone
         \orelse\ifdim\scratchdimen>\zeropoint\relax
-          \advance\!!dimena -\scratchdimen
+          \advance\scratchdimenone -\scratchdimen
         \else
           % eigenlijk moet dit alleen als de kolom wordt overspannen door een
           % vorige, maw extra dubbele loop en status var
           \ifnum\c_tabl_ntb_encountered_max=\c_tabl_ntb_maximum_col % *nx* bah
-            \advance\!!counta \plusone % setting maxwidth to a large value also works
+            \advance\scratchcounterone \plusone % setting maxwidth to a large value also works
           \fi
         \fi
       \fi}%
    \ifconditional\c_tabl_ntb_trace_widths\tabl_ntb_show_widths M#1\fi
-   \ifcase\!!counta \else \divide\!!dimena \!!counta \fi
+   \ifcase\scratchcounterone \else \divide\scratchdimenone \scratchcounterone \fi
    \dorecurse\c_tabl_ntb_maximum_col
      {\scratchdimen\tabl_ntb_get_wid\recurselevel\relax
       \ifcase#1\relax
-        \ifdim\scratchdimen<\!!dimena  % take natural width
+        \ifdim\scratchdimen<\scratchdimenone  % take natural width
           \tabl_ntb_set_aut\recurselevel{\the\scratchdimen}%
         \fi
       \else
         \ifzeropt\scratchdimen % auto set width
-          \tabl_ntb_set_wid\recurselevel{\the\!!dimena}%
+          \tabl_ntb_set_wid\recurselevel{\the\scratchdimenone}%
         \fi
       \fi}%
    \ifconditional\c_tabl_ntb_trace_widths\tabl_ntb_show_widths E#1\fi}
@@ -1768,9 +1768,9 @@
 % todo: use scratchcounters, not !! ones
 
 \def\tabl_ntb_check_heights_one_indeed
-  {\!!countb\tabl_ntb_get_row\c_tabl_ntb_current_row_three\c_tabl_ntb_current_col_three\relax
+  {\scratchcountertwo\tabl_ntb_get_row\c_tabl_ntb_current_row_three\c_tabl_ntb_current_col_three\relax
     % check row span
-   \ifnum\!!countb>\plusone
+   \ifnum\scratchcountertwo>\plusone
      % current height in row
      \dimen0=\tabl_ntb_get_ht\c_tabl_ntb_current_row_three\c_tabl_ntb_current_col_three
      % find nearest height in row
@@ -1778,8 +1778,8 @@
      \dorecurse\c_tabl_ntb_maximum_col
        {\ifnum\recurselevel=\c_tabl_ntb_current_col_three\else
           \ifcsname\tabl_ntb_row_pattern\c_tabl_ntb_current_row_three\recurselevel\endcsname
-            \!!countc=\tabl_ntb_get_row\c_tabl_ntb_current_row_three\recurselevel\relax
-            \ifnum\!!countc=\plusone
+            \scratchcounterthree\tabl_ntb_get_row\c_tabl_ntb_current_row_three\recurselevel\relax
+            \ifnum\scratchcounterthree=\plusone
               \dimen4=\tabl_ntb_get_ht\c_tabl_ntb_current_row_three\recurselevel\relax
               \ifdim\dimen2<\dimen4
                 \dimen2=\dimen4
@@ -1790,25 +1790,25 @@
      \c_tabl_ntb_current_row_four\c_tabl_ntb_current_row_three
      % calculate cummulative height
      \dimen4=\dimen2
-     \!!countc\c_tabl_ntb_current_row_three
-     \advance\!!countc\minusone
-     \dorecurse\!!countb
+     \scratchcounterthree\c_tabl_ntb_current_row_three
+     \advance\scratchcounterthree\minusone
+     \dorecurse\scratchcountertwo
        {\ifnum\c_tabl_ntb_current_row_four=\c_tabl_ntb_current_row_three\else
           \advance\dimen4 \tabl_ntb_get_hei\c_tabl_ntb_current_row_four
         \fi
-        \ifnum\recurselevel=\!!countb\else
-          \tabl_ntb_set_nob\!!countc
-          \advance\!!countc\plusone
+        \ifnum\recurselevel=\scratchcountertwo\else
+          \tabl_ntb_set_nob\scratchcounterthree
+          \advance\scratchcounterthree\plusone
        \fi
         \advance\c_tabl_ntb_current_row_four\plusone}%
      % distribute overshoot equally
      \ifdim\dimen2>\zeropoint % new: test on natural-003
        \ifdim\dimen4<\dimen0
          \advance\dimen0 -\dimen4
-         \divide\dimen0 \!!countb
+         \divide\dimen0 \scratchcountertwo
          \c_tabl_ntb_current_row_four\c_tabl_ntb_current_row_three
          \tabl_ntb_set_hei\c_tabl_ntb_current_row_three{\the\dimen2}%
-         \dorecurse\!!countb
+         \dorecurse\scratchcountertwo
            {\dorecurse\c_tabl_ntb_maximum_col
               {\ifnum\recurselevel=\c_tabl_ntb_current_col_three\else
                  \scratchdimen\dimexpr\tabl_ntb_get_ht\c_tabl_ntb_current_row_four\recurselevel+\dimen0\relax
diff --git a/tex/context/base/mkiv/tabl-tab.mkxl b/tex/context/base/mkiv/tabl-tab.mkxl
index 96eade4b4..e6449396c 100644
--- a/tex/context/base/mkiv/tabl-tab.mkxl
+++ b/tex/context/base/mkiv/tabl-tab.mkxl
@@ -1563,20 +1563,20 @@
 
 \def\tabl_table_split_box#1%
   {\resettsplit
-   \def\tsplitminimumfreelines{2}%
-   \def\tsplitminimumfreespace{\zeropoint}%
-   \setbox\tsplitcontent\box#1%
+   \c_split_minimum_free_lines\plustwo
+   \d_split_minimum_free_space\zeropoint
+   \setbox\b_split_content\box#1%
    \ifconditional\c_tabl_table_repeat_head \ifconditional\hassometablehead
-     \setbox\tsplithead\vsplit\tsplitcontent to \lineheight
-     \setbox\tsplithead\vbox{\unvbox\tsplithead}% \vpack ?
+     \setbox\b_split_head\vsplit\b_split_content to \lineheight
+     \setbox\b_split_head\vbox{\unvbox\b_split_head}% \vpack ?
    \fi \fi
    \ifconditional\c_tabl_table_repeat_tail \ifconditional\hassometabletail
-     \setbox\tsplittail\vsplit\tsplitcontent to \lineheight
-     \setbox\tsplittail\vbox{\unvbox\tsplittail}% \vpack ?
+     \setbox\b_split_tail\vsplit\b_split_content to \lineheight
+     \setbox\b_split_tail\vbox{\unvbox\b_split_tail}% \vpack ?
    \fi \fi
    \ifinsidefloat\else
-     \def\tsplitbeforeresult{\startbaselinecorrection}%
-     \def\tsplitafterresult {\stopbaselinecorrection}%
+     \t_split_before_result{\startbaselinecorrection}%
+     \t_split_after_result {\stopbaselinecorrection}%
    \fi
    \handletsplit}
 
diff --git a/tex/context/base/mkiv/tabl-tbl.mkxl b/tex/context/base/mkiv/tabl-tbl.mkxl
index 1149a38d7..723758fb8 100644
--- a/tex/context/base/mkiv/tabl-tbl.mkxl
+++ b/tex/context/base/mkiv/tabl-tbl.mkxl
@@ -2310,8 +2310,8 @@
    \dostarttaggedchained\t!tabulate\empty\??tabulation
    \dostarttagged\t!tabulaterow\empty
    \setfalse\inhibitmargindata % new per 2012.06.13 ... really needed
- % \everycr\expandafter{\the\everycr\noalign{\the\t_tabl_tabulate_every_real_row}\dostoptagged\dostarttagged\t!tabulaterow\empty}%
-   \toksapp\everycr{\noalign{\the\t_tabl_tabulate_every_real_row}\dostoptagged\dostarttagged\t!tabulaterow\empty}%
+%  % \everycr\expandafter{\the\everycr\noalign{\the\t_tabl_tabulate_every_real_row}\dostoptagged\dostarttagged\t!tabulaterow\empty}%
+%    \toksapp\everycr{\noalign{\the\t_tabl_tabulate_every_real_row\dostoptagged\dostarttagged\t!tabulaterow\empty}}%
    \expandafter\halign\expandafter{\the\t_tabl_tabulate_preamble\crcr\tabl_tabulate_insert_content\crcr}%
    \dostoptagged
    \dostoptagged
@@ -2370,14 +2370,14 @@
 
 \def\tabl_split_box_indeed#1%
   {\resettsplit
-   \def\tsplitminimumfreelines{2}%
-   \def\tsplitminimumfreespace{0pt}%
-   \setbox\tsplitcontent\box#1%
+   \c_split_minimum_free_lines\plustwo
+   \d_split_minimum_free_space\zeropoint
+   \setbox\b_split_content\box#1%
    \ifcase\c_tabl_tabulate_repeathead\or
-     \setbox\tsplithead\vsplit\tsplitcontent to \lineheight
-     \setbox\tsplithead\vbox{\unvbox\tsplithead}%
+     \setbox\b_split_head\vsplit\b_split_content to \lineheight
+     \setbox\b_split_head\vbox{\unvbox\b_split_head}%
    \or
-     \setbox\tsplithead\vbox{\hbox{\strut\tabulationparameter\c!title}}%
+     \setbox\b_split_head\vbox{\hbox{\strut\tabulationparameter\c!title}}%
    \fi
    \handletsplit}
 
diff --git a/tex/context/base/mkiv/tabl-tsp.mkxl b/tex/context/base/mkiv/tabl-tsp.mkxl
new file mode 100644
index 000000000..f09a5d9d8
--- /dev/null
+++ b/tex/context/base/mkiv/tabl-tsp.mkxl
@@ -0,0 +1,575 @@
+%D \module
+%D   [       file=tabl-tsp,
+%D        version=2000.10.20,
+%D          title=\CONTEXT\ Table Macros,
+%D       subtitle=Splitting,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Table Macros / Splitting}
+
+%D The code in this file is moved here from other places and needs a mkiv cleanup.
+%D As it mostly targets at tables the code lives in the tabl and page namespaces.
+
+% work in progress
+
+\unprotect
+
+%D Although the name resembles floats, and therefore this should be a page module,
+%D we decided to make it core functionality because the table code depends on it.
+%D Othrwise there would be too much overloading afterwards involved. Actually, the
+%D float part is rather generic and not that related to floats.
+
+% \splitfloat [settings] {\placetable[optional args]{test}} {content}
+
+%D When \type {inbetween} is made empty instead of the default \type {\page}, we
+%D will get delayed flushing and text may continue below the graphic.
+%D
+%D \starttyping
+%D \dorecurse{2}{\input tufte }
+%D
+%D \splitfloat[lines=auto,inbetween=]
+%D   {\placetable{\dorecurse{5}{test\recurselevel\endgraf}}}
+%D   {\bTABLE[split=yes]
+%D    \bTR \bTD 11 \eTD \bTD \input tufte \eTD \eTR
+%D    \bTR \bTD 12 \eTD \bTD \input zapf \eTD \eTR
+%D    \bTR \bTD 13 \eTD \bTD \input bryson \eTD \eTR
+%D    \bTR \bTD 14 \eTD \bTD test  \eTD \eTR
+%D    \bTR \bTD 21 \eTD \bTD \input tufte \eTD \eTR
+%D    \bTR \bTD 22 \eTD \bTD \input zapf \eTD \eTR
+%D    \bTR \bTD 23 \eTD \bTD \input bryson \eTD \eTR
+%D    \bTR \bTD 24 \eTD \bTD test  \eTD \eTR
+%D    \bTR \bTD 31 \eTD \bTD \input tufte \eTD \eTR
+%D    \bTR \bTD 32 \eTD \bTD \input zapf \eTD \eTR
+%D    \bTR \bTD 33 \eTD \bTD \input bryson \eTD \eTR
+%D    \bTR \bTD 34 \eTD \bTD test  \eTD \eTR
+%D    \eTABLE}
+%D
+%D \dorecurse{10}{\input tufte }
+%D \stoptyping
+
+\installcorenamespace{floatsplitting}
+
+\installdirectcommandhandler \??floatsplitting {floatsplitting} % \??floatsplitting
+
+\setupfloatsplitting
+  [\c!conversion=\v!character, % \v!romannumerals
+   \c!lines=3,
+   \c!before=,
+   \c!inbetween=\page,
+   \c!after=]
+
+\newconditional\splitfloatfirstdone
+\newconditional\somenextsplitofffloat
+\newconditional\splitfloatdone
+\newconditional\onlyonesplitofffloat   \settrue\onlyonesplitofffloat
+
+\newif         \ifinsidesplitfloat   % will become conditional
+
+\newcount      \noffloatssplits
+\newtoks       \everysplitfloatsetup
+
+\let           \extrasplitfloatlines \!!zerocount
+\let           \splitfloatfinalizer  \relax
+
+\mutable\let   \floatcaptionsuffix   \empty
+
+\permanent\tolerant\protected\def\splitfloat[#1]#:#2% nog dubbele refs
+  {\bgroup
+   \global\setfalse\splitfloatdone
+   \aftergroup\page_split_float_check
+   \insidefloattrue
+   \insidesplitfloattrue
+   \setupcurrentfloatsplitting[#1]%
+   \global\noffloatssplits\zerocount
+   \let\floatcaptionsuffix\page_split_float_suffix
+   \edef\extrasplitfloatlines{\floatsplittingparameter\c!lines}%
+   \the\everysplitfloatsetup
+   \def\splitfloatcommand{#2}%
+   \global\settrue \onlyonesplitofffloat
+   \global\setfalse\somenextsplitofffloat
+   \page_floats_push_saved
+   \floatsplittingparameter\c!before
+   \let\next} % \bgroup
+
+\protected\def\page_split_float_suffix
+  {\begingroup
+   \usefloatsplittingstyleandcolor\c!style\c!color % only the suffix
+   \convertnumber{\floatsplittingparameter\c!conversion}\noffloatssplits
+   \endgroup}
+
+\protected\def\page_split_float_check
+  {\ifconditional\splitfloatdone
+     \splitfloatfinalizer % a weird place (could interfere with flushing)
+   \else
+     \blank
+     \begingroup
+     \tttf \dontleavehmode \getmessage\m!floatblocks{13}\empty
+     \endgroup
+     \blank
+     \showmessage\m!floatblocks{13}\empty
+   \fi}
+
+\def\page_split_float_process % nextbox
+  {\ifinsidesplitfloat
+     \expandafter\page_split_float_process_yes
+   \else
+     \expandafter\page_split_float_process_nop
+   \fi}
+
+\def\page_split_float_process_yes
+  {\dowithnextboxcs\page_split_float_process_finish\vbox}
+
+\def\page_split_float_process_finish
+  {\forgetall
+   \dontcomplain
+   \global\settrue\splitfloatdone
+ % \nodelocationmode\zerocount % bypass auto-renumbering
+   \global\advance\noffloatssplits\plusone
+   \ifcase\noffloatssplits\relax \or
+     \ifconditional\onlyonesplitofffloat
+       \let\floatcaptionsuffix\empty
+     \fi
+   \fi
+   \bgroup
+     \ifconditional\somenextsplitofffloat
+       \notesenabledfalse % best here, experimental, brrr; test with note in caption
+     \fi
+     \splitfloatcommand{\box\nextbox}%
+   \egroup
+   \ifconditional\somenextsplitofffloat
+     \edef\p_inbetween{\floatsplittingparameter\c!inbetween}%
+     \ifempty\p_inbetween
+       \ifconditional\splitfloatfirstdone\else\page\fi
+     \else
+       \p_inbetween
+     \fi
+   \else
+     \floatsplittingparameter\c!after
+     \page_floats_pop_saved
+     \page_floats_flush_saved
+   \fi
+   \global\settrue\splitfloatfirstdone}
+
+\def\page_split_float_process_nop
+  {\dowithnextboxcs\page_split_float_process_nop_finish\vbox}
+
+\def\page_split_float_process_nop_finish
+  {\forgetall
+   \dontcomplain
+   \box\nextbox % maybe an option to unvbox
+   \global\settrue\splitfloatfirstdone}
+
+\def\page_split_float_check_content#1% box
+  {\ifinsidesplitfloat
+   % \ifdim\ht#1=\zeropoint % funny: \ifcase does not check for overflow
+     \ifcase\ht#1\relax
+       \global\setfalse\somenextsplitofffloat
+     \else
+       \global\settrue \somenextsplitofffloat
+       \global\setfalse\onlyonesplitofffloat
+     \fi
+   \fi}
+
+\def\page_split_float_check_caption#1% depends on page-flt .. pretty messy
+  {\edef\extrasplitfloatlines{\extrasplitfloatlines}%
+   \ifx\extrasplitfloatlines\v!auto
+      \bgroup
+      \forcelocalfloats
+      \setuplocalfloats[\c!before=,\c!after=,\c!inbetween=]%
+      % This controls samepage resetting too but it also messes up the numbering
+      % so I need another fix.
+%       \settrialtypesetting
+      \splitfloatcommand{\hbox to #1{\strut}}% dummy line
+%       \resettrialtypesetting
+      \setbox\scratchbox\vbox{\flushlocalfloats}% \vpack ?
+      \getnoflines{\ht\scratchbox}%
+      \resetlocalfloats
+      \advance\noflines\minusone % compensate dummy line
+      \normalexpanded{\egroup\noexpand\edef\noexpand\extrasplitfloatlines{\the\noflines}}%
+      \global\settrue\usesamefloatnumber
+   \else
+      \doifelsenumber\extrasplitfloatlines\donothing{\def\extrasplitfloatlines{1}}%
+   \fi}
+
+\permanent\protected\def\doifnotinsidesplitfloat
+  {\ifinsidesplitfloat
+     \expandafter\gobbleoneargument
+   \fi}
+
+%D Table splitter, on top of previous code:
+
+% todo: keep tail to rest, so we need a lookahead
+
+\newbox\b_split_content
+\newbox\b_split_result
+\newbox\b_split_head
+\newbox\b_split_next
+\newbox\b_split_tail
+
+\newtoks\t_split_before_result
+\newtoks\t_split_after_result
+\newtoks\t_split_before
+\newtoks\t_split_inbetween
+\newtoks\t_split_after
+
+\newtoks\everyresettsplit
+
+\newcount\c_split_minimum_free_lines
+
+\newdimen\d_split_minimum_free_space
+\newdimen\d_split_available_height
+\newdimen\d_split_inbetween_height
+
+\newconditional\c_tabl_split_done
+\newconditional\c_tabl_split_head
+\newconditional\c_tabl_split_full
+
+\newconditional\tabl_split_forced_page
+
+\appendtoks
+   \c_split_minimum_free_lines\zerocount
+   \d_split_minimum_free_space\zeropoint
+   \setbox\b_split_content    \emptyvbox
+   \setbox\b_split_result     \emptyvbox
+   \setbox\b_split_head       \emptyvbox
+   \setbox\b_split_next       \emptyvbox
+   \setbox\b_split_tail       \emptyvbox
+   \t_split_before_result     \emptytoks
+   \t_split_after_result      \emptytoks
+   \t_split_inbetween         \emptytoks
+   \t_split_before            \emptytoks
+   \t_split_after             \emptytoks
+   \let\postprocesstsplit     \donothing
+\to \everyresettsplit
+
+\permanent\protected\def\resettsplit
+  {\the\everyresettsplit}
+
+\resettsplit
+
+\def\tsplitdirectwidth{\hsize}
+
+\protected\def\handletsplit
+  {\page_split_float_check_caption{\wd\b_split_content}%
+   \global\setfalse\splitfloatfirstdone
+   \testpagesync % new, sync, but still tricky
+     [\number\c_split_minimum_free_lines]
+     [\dimexpr\d_split_minimum_free_space+\extrasplitfloatlines\lineheight\relax]%
+   \setbox\scratchbox\vbox{\the\t_split_inbetween}%
+   \d_split_inbetween_height\htdp\scratchbox
+   \setfalse\c_tabl_split_done
+   \doloop\tabl_split_loop_body
+   \global\setfalse\usesamefloatnumber % new, prevent next increment
+   \global\setfalse\splitfloatfirstdone} % we can use this one for tests
+
+\def\tabl_split_loop_body
+  {\ifinsidecolumns
+     % brrr, assumes empty columns
+     \global\setfalse\splitfloatfirstdone
+     \d_split_available_height\textheight
+     \settrue\c_tabl_split_full
+   \else
+     \ifconditional\splitfloatfirstdone
+       \d_split_available_height\textheight
+       \settrue\c_tabl_split_full
+     \orelse\ifdim\pagegoal<\maxdimen
+       \d_split_available_height\dimexpr\pagegoal-\pagetotal\relax
+       \setfalse\c_tabl_split_full
+     \else
+       \d_split_available_height\textheight
+       \settrue\c_tabl_split_full
+     \fi
+   \fi
+   \d_split_available_height \dimexpr
+      \d_split_available_height
+     -\d_split_inbetween_height
+     -\d_split_minimum_free_space
+     -\extrasplitfloatlines\lineheight
+   \relax
+   \ifdim\htdp\b_split_tail>\zeropoint
+     \advance\d_split_available_height-\htdp\b_split_tail
+   \fi
+   \setbox\b_split_result\vbox
+     {\ifdim\ht\b_split_head>\zeropoint
+        \unvcopy\b_split_head
+        \the\t_split_inbetween
+      \fi}%
+   \ifconditional\c_tabl_split_done \else
+     \ifdim\ht\b_split_next>\zeropoint
+       \setbox\b_split_head\box\b_split_next
+     \fi
+   \fi
+   \settrue\c_tabl_split_done
+   \ifdim\ht\b_split_result>\zeropoint
+     \settrue\c_tabl_split_head  % table head
+   \else
+     \setfalse\c_tabl_split_head % no tablehead
+   \fi
+   \splittopskip\zeropoint
+   \doloop % inner loop
+     {\setbox\scratchbox\vsplit\b_split_content to \onepoint % \lineheight
+      \setbox\scratchbox\vbox % \vpack
+        {\unvbox\scratchbox
+         \setbox\scratchbox\vbox % \vpack
+           {\splitdiscards
+            \ifnum\lastpenalty>-\plustenthousand\else
+               % so that \bTR[before=\page] works
+               \global\settrue\tabl_split_forced_page
+            \fi}}%
+      \ifconditional\tabl_split_forced_page
+        \global\setfalse\tabl_split_forced_page
+        \setbox\b_split_result\vbox
+          {\unvbox\b_split_result
+           \the\t_split_inbetween
+           \unvbox\scratchbox}%
+        \exitloop
+      \orelse\ifdim\dimexpr\d_split_available_height-\htdp\scratchbox-\htdp\b_split_result\relax>\zeropoint
+        \setbox\b_split_result\vbox
+          {\unvbox\b_split_result
+           \the\t_split_inbetween
+           \unvbox\scratchbox}%
+        \ifvoid\b_split_content \exitloop \fi
+      \orelse\ifconditional\c_tabl_split_head
+        % we only have a tablehead so far
+        \setbox\b_split_result\vbox{\unvbox\b_split_result\unvbox\scratchbox}% \vpack
+        \exitloop
+      \orelse\ifconditional\c_tabl_split_full
+        % we have text height available, but the (one) cell is too
+        % large to fit, so, in order to avoid loops/deadcycles we do:
+        \setbox\b_split_result\vbox
+          {\unvbox\b_split_result
+           \the\t_split_inbetween
+           \unvbox\scratchbox}%
+        \exitloop
+      \else
+        \setbox\b_split_content\vbox
+          {\unvbox\scratchbox
+           \the\t_split_inbetween
+           \ifvoid\b_split_content\else\unvbox\b_split_content\fi}%
+        \exitloop
+      \fi
+      \setfalse\c_tabl_split_head
+      \setfalse\c_tabl_split_full}%
+   \postprocesstsplit
+   \page_split_float_check_content\b_split_content
+   \ifvoid\b_split_content
+     \setbox\b_split_result\vbox
+       {\unvbox\b_split_result
+        \the\t_split_inbetween
+        \unvcopy\b_split_tail}%
+     \page_split_float_process{\the\t_split_before_result\box\b_split_result\the\t_split_after_result}%
+     \doifnotinsidesplitfloat{\the\t_split_after}%
+     \endgraf
+     \exitloop
+   \else
+     % hack
+     \ifdim\pagegoal<\maxdimen
+       \pagegoal\dimexpr\pagegoal+\lineheight\relax % etex
+     \fi
+     % brrr
+     \ifdim\ht\b_split_result>\zeropoint
+       \setbox\b_split_result\vbox
+         {\unvbox\b_split_result
+          \the\t_split_inbetween
+          \unvcopy\b_split_tail}%
+       \page_split_float_process{\the\t_split_before_result\box\b_split_result\the\t_split_after_result}%
+       \doifnotinsidesplitfloat{\the\t_split_after}%
+       \endgraf
+       \global\settrue\usesamefloatnumber % new, prevent next increment
+     \fi
+     \ifinsidecolumns
+       \goodbreak % was \doifnotinsidesplitfloat\goodbreak
+     \else
+       \page      % was \doifnotinsidesplitfloat\page
+     \fi
+   \fi}
+
+%D The next one assumes that the split takes place elsewhere. This is used in
+%D xtables.
+
+\aliased\let\resetdirecttsplit\resettsplit
+
+\permanent\protected\def\handledirecttsplit
+  {\page_split_float_check_caption{\tsplitdirectwidth}%
+   \global\setfalse\splitfloatfirstdone
+   \testpagesync % new, sync, but still tricky
+     [\number\c_split_minimum_free_lines]
+     [\dimexpr\d_split_minimum_free_space+\extrasplitfloatlines\lineheight\relax]%
+   \doloop\tabl_split_direct_loop_body
+   \global\setfalse\usesamefloatnumber   % new, prevent next increment
+   \global\setfalse\splitfloatfirstdone} % we can use this one for tests
+
+\def\tabl_split_direct_loop_body
+  {\ifinsidecolumns
+     \global\setfalse\splitfloatfirstdone
+     \d_split_available_height\textheight
+   \orelse\ifconditional\splitfloatfirstdone
+     \d_split_available_height\textheight
+   \orelse\ifdim\pagegoal<\maxdimen
+     \d_split_available_height\dimexpr\pagegoal-\pagetotal\relax
+   \else
+     \d_split_available_height\textheight
+   \fi
+   \d_split_available_height\dimexpr
+      \d_split_available_height
+     -\d_split_minimum_free_space
+     -\extrasplitfloatlines\lineheight
+   \relax
+   \tsplitdirectsplitter\d_split_available_height % also sets state
+   \ifdim\ht\b_split_result>\zeropoint
+     \ifconditional\somenextsplitofffloat
+       \global\setfalse\onlyonesplitofffloat
+     \fi
+     \ifdim\pagegoal<\maxdimen
+       \pagegoal\dimexpr\pagegoal+\lineheight\relax % etex
+     \fi
+     \page_split_float_process{\the\t_split_before_result\box\b_split_result\the\t_split_after_result}%
+     \global\settrue\usesamefloatnumber % new, prevent next increment
+     \endgraf
+     \ifconditional\somenextsplitofffloat
+       \ifinsidecolumns
+         \goodbreak
+       \else
+         \page
+       \fi
+     \fi
+     \global\settrue\splitfloatfirstdone
+   \orelse\ifconditional\somenextsplitofffloat
+     \ifinsidecolumns
+       \goodbreak
+     \else
+       \page % no room
+     \fi
+   \else
+      \exitloop
+   \fi}
+
+%D Maybe handy:
+%D
+%D \starttyping
+%D \splitfloat
+%D   {\placefigure{some caption}}
+%D   {\startsplittext
+%D    \typefile[option=TEX,before=,after=]{oeps.tex}
+%D    \stopsplittext}
+%D \stoptyping
+
+\permanent\def\handlesplittext#1%
+  {\setbox\b_split_result\vbox
+     {\vsplit\b_split_content to \dimexpr#1-\lineheight\relax}}
+
+\permanent\protected\def\startsplittext
+  {\begingroup
+   \resettsplit
+   \c_split_minimum_free_lines\zerocount
+   \d_split_minimum_free_space\zeropoint
+   \let\extrasplitfloatlines  \!!plusone
+   \let\tsplitdirectsplitter  \handlesplittext
+   \setbox\b_split_content\vbox\bgroup
+   \insidefloattrue}
+
+\permanent\protected\def\stopsplittext
+  {\egroup
+   \handledirecttsplit
+   \endgroup}
+
+\protect \endinput
+
+% test cases
+
+% \setupTABLE[split=repeat]
+%
+% \input tufte \endgraf
+% \splitfloat[lines=11]
+%   {\placetable{\dorecurse{10}{test\recurselevel\endgraf}}}
+%   {\bTABLE\dorecurse{100}{\bTR \bTD test \eTD \eTR}\eTABLE}
+% \input tufte \page
+%
+% \input tufte \endgraf
+% \splitfloat[lines=0]
+%   {}
+%   {\bTABLE\dorecurse{100}{\bTR \bTD test \eTD \eTR}\eTABLE}
+% \input tufte \endgraf \page
+%
+% \input tufte \endgraf
+% \bTABLE\dorecurse{100}{\bTR \bTD test \eTD \eTR}\eTABLE
+% \input tufte \page
+
+% \setuptabulate[split=yes]
+%
+% \input tufte \endgraf
+% \splitfloat[lines=11]
+%   {\placetable{\dorecurse{10}{test\recurselevel\endgraf}}}
+%   {\starttabulate\dorecurse{200}{\NC test \NC test \NC \NR}\stoptabulate}
+% \input tufte \page
+%
+% \input tufte \endgraf
+% \splitfloat[lines=0]
+%   {}
+%   {\starttabulate\dorecurse{200}{\NC test \NC test \NC \NR}\stoptabulate}
+% \input tufte \page
+%
+% \input tufte \endgraf
+% \starttabulate\dorecurse{200}{\NC test \NC test \NC \NR}\stoptabulate
+% \input tufte \page
+
+% \setuptables[split=yes]
+%
+% \newtoks\TestToks
+%
+% \TestToks\emptytoks
+% \appendtoks\starttablehead\to\TestToks
+% \dorecurse{3}{\appendtoks\VL head \VL head \VL \SR\to\TestToks}
+% \appendtoks\stoptablehead\to\TestToks
+% \appendtoks\starttabletail\to\TestToks
+% \dorecurse{3}{\appendtoks\VL tail \VL tail \VL \SR\to\TestToks}
+% \appendtoks\stoptabletail\to\TestToks
+% \appendtoks\starttables[|c|c|]\to\TestToks
+% \dorecurse{100}{\appendtoks\VL test \VL test \VL \SR\to\TestToks}
+% \appendtoks\stoptables\to\TestToks
+%
+% \input tufte \endgraf
+% \splitfloat[lines=auto] % [lines=11]
+%   {\placetable{\dorecurse{10}{test\recurselevel\endgraf}}}
+%   {\the\TestToks}
+% \input tufte \page
+%
+% \input tufte \endgraf
+% \splitfloat[lines=0]
+%   {}
+%   {\the\TestToks}
+% \input tufte \page
+%
+% \input tufte \endgraf
+% \the\TestToks
+% \input tufte \page
+%
+% multiple floats
+%
+% \starttext
+%   \dorecurse{3}{\input tufte } \endgraf
+%   \dorecurse{5}{\placefigure{}{\framed[height=.5\textheight]{}}}
+%   \splitfloat[lines=auto,inbetween=]
+%     {\placetable{\dorecurse{5}{test\recurselevel\endgraf}}}
+%     {\bTABLE[split=yes]
+%      \bTR \bTD 11 \eTD \bTD \input tufte \eTD \eTR
+%      \bTR \bTD 12 \eTD \bTD \input zapf \eTD \eTR
+%      \bTR \bTD 13 \eTD \bTD \input bryson \eTD \eTR
+%      \bTR \bTD 14 \eTD \bTD test  \eTD \eTR
+%      \bTR \bTD 21 \eTD \bTD \input tufte \eTD \eTR
+%      \bTR \bTD 22 \eTD \bTD \input zapf \eTD \eTR
+%      \bTR \bTD 23 \eTD \bTD \input bryson \eTD \eTR
+%      \bTR \bTD 24 \eTD \bTD test  \eTD \eTR
+%      \bTR \bTD 31 \eTD \bTD \input tufte \eTD \eTR
+%      \bTR \bTD 32 \eTD \bTD \input zapf \eTD \eTR
+%      \bTR \bTD 33 \eTD \bTD \input bryson \eTD \eTR
+%      \bTR \bTD 34 \eTD \bTD test  \eTD \eTR
+%      \eTABLE}
+%   \dorecurse{10}{\input tufte }
+% \stoptext
diff --git a/tex/context/base/mkiv/tabl-xtb.mklx b/tex/context/base/mkiv/tabl-xtb.mklx
index 41e7c9b86..906355d42 100644
--- a/tex/context/base/mkiv/tabl-xtb.mklx
+++ b/tex/context/base/mkiv/tabl-xtb.mklx
@@ -68,13 +68,6 @@
 % cells: option=fixed    : nils autostretch (not yet complete)
 
 % \setbox\scratchbox\hbox attr \taggedattribute \c_attr_tagged {...}
-%
-% \let\tsplitbeforeresult\donothing
-% \let\tsplitafterresult \donothing
-% \let\tsplitinbetween   \donothing
-% \let\tsplitbefore      \donothing
-% \let\tsplitafter       \donothing
-% \let\postprocesstsplit \donothing
 
 \aliased\let\dotagxtablecell  \relax % names will change
 \aliased\let\dotagxtablesignal\relax % names will change
@@ -426,15 +419,15 @@
 
 \protected\def\tabl_x_flush_float_split
   {\resetdirecttsplit
-   \edef\extrasplitfloatlines  {\xtableparameter\c!split}%
-   \edef\tsplitminimumfreespace{\the\dimexpr\extratxtablesplitheight+\xtableparameter\c!splitoffset\relax}%
- % \edef\tsplitminimumfreelines{2}% not needed here as we're precise enough
+   \edef\extrasplitfloatlines{\xtableparameter\c!split}%
+   \d_split_minimum_free_space\dimexpr\extratxtablesplitheight+\xtableparameter\c!splitoffset\relax
+  %\c_split_minimum_free_lines\plustwo % not needed here as we're precise enough
    \let\tsplitdirectsplitter\tabl_x_split_splitter
    \let\tsplitdirectwidth   \d_tabl_x_final_width
    \handledirecttsplit}
 
 \protected\def\tabl_x_split_splitter#height%
-  {\setbox\tsplitresult\vbox
+  {\setbox\b_split_result\vbox
      {\clf_x_table_flush
         method {\v!split}%
         height \dimexpr#height\relax
diff --git a/tex/context/base/mkiv/task-ini.mkxl b/tex/context/base/mkiv/task-ini.mkxl
new file mode 100644
index 000000000..77e4fa985
--- /dev/null
+++ b/tex/context/base/mkiv/task-ini.mkxl
@@ -0,0 +1,22 @@
+%D \module
+%D   [       file=task-ini,
+%D        version=2007.06.06,
+%D          title=\CONTEXT\ Task Handler,
+%D       subtitle=Initialization,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Task Handler / initialization}
+
+\unprotect
+
+%D Maybe we will make things configureable (speed up and such).
+
+\registerctxluafile{task-ini}{}
+
+\protect \endinput
diff --git a/tex/context/base/mkiv/toks-aux.lmt b/tex/context/base/mkiv/toks-aux.lmt
index e1a4e89b3..03f4dc2c1 100644
--- a/tex/context/base/mkiv/toks-aux.lmt
+++ b/tex/context/base/mkiv/toks-aux.lmt
@@ -133,6 +133,7 @@ local glyphoptioncodes = { }
 local hyphenationcodes = { }
 local frozenparcodes   = { }
 local flagcodes        = { }
+local normalizecodes   = { }
 
 for k, v in next, tex.getgroupvalues() do
     groupcodes[k] = gsub(v,"[_ ]","")
@@ -149,6 +150,9 @@ end
 for k, v in next, tex.getflagvalues() do
     flagcodes[k] = gsub(v,"[_ ]","")
 end
+for k, v in next, tex.getnormalizevalues() do
+    normalizecodes[k] = gsub(v,"[_ ]","")
+end
 
 
 if environment.initex then
@@ -160,6 +164,7 @@ if environment.initex then
     for k, v in next, hyphenationcodes do texintegerdef(v .. "hyphenationmodecode",k,"immutable") end
     for k, v in next, frozenparcodes   do texintegerdef("frozen" .. v .. "code",   k,"immutable") end
     for k, v in next, flagcodes        do texintegerdef(v .. "flagcode",           k,"immutable") end
+    for k, v in next, normalizecodes   do texintegerdef(v .. "code",               k,"immutable") end
 
 end
 
@@ -168,9 +173,11 @@ glyphoptioncodes     = utilities.storage.allocate(table.swapped(glyphoptioncodes
 hyphenationcodes     = utilities.storage.allocate(table.swapped(hyphenationcodes,hyphenationcodes))
 frozenparcodes       = utilities.storage.allocate(table.swapped(frozenparcodes,  frozenparcodes))
 flagcodes            = utilities.storage.allocate(table.swapped(flagcodes,       flagcodes))
+normalizecodes       = utilities.storage.allocate(table.swapped(normalizecodes,  normalizecodes))
 
 tex.groupcodes       = groupcodes
 tex.glyphoptioncodes = glyphoptioncodes
 tex.hyphenationcodes = hyphenationcodes
 tex.frozenparcodes   = frozenparcodes
 tex.flagcodes        = flagcodes
+tex.normalizecodes   = normalizecodes
diff --git a/tex/context/base/mkiv/typo-dir.mkxl b/tex/context/base/mkiv/typo-dir.mkxl
index ac7924603..55fabffc0 100644
--- a/tex/context/base/mkiv/typo-dir.mkxl
+++ b/tex/context/base/mkiv/typo-dir.mkxl
@@ -89,7 +89,7 @@
 
 \appendtoks
     \edef\p_option{\directionsparameter\c!break}% name can change
-    \bitwiseflip\normalizelinemode\ifx\p_option\v!both\else-\fi\breakafterdirmodecode
+    \bitwiseflip\normalizelinemode\ifx\p_option\v!both\else-\fi\breakafterdircode
 \to \everysetupdirections
 
 % bidi: local=obey grouping, global=ignore grouping (unicode has no grouping)
diff --git a/tex/context/base/mkiv/typo-mar.mkxl b/tex/context/base/mkiv/typo-mar.mkxl
index 8c8fc218e..5d6f15f21 100644
--- a/tex/context/base/mkiv/typo-mar.mkxl
+++ b/tex/context/base/mkiv/typo-mar.mkxl
@@ -313,11 +313,8 @@
 
 %D Downward compatible hack:
 
-\permanent\protected\def\typo_margins_space_or_par
-  {\endgraf\ifhmode\space\fi}
-
 \appendtoks
-    \enforced\let\\\typo_margins_space_or_par
+    \enforced\let\\\spaceorpar
 \to \everymargindatacontent
 
 %D Another one:
diff --git a/tex/context/modules/mkiv/s-system-macros.mkxl b/tex/context/modules/mkiv/s-system-macros.mkxl
index a28a27775..91aad763a 100644
--- a/tex/context/modules/mkiv/s-system-macros.mkxl
+++ b/tex/context/modules/mkiv/s-system-macros.mkxl
@@ -110,18 +110,21 @@
                 local whatever  = find(k,"^[a-z][a-z][a-z]+_")
                 local filename  = files[k]
                 local csname    = context.escape(k)
-                ctx_NC() if dealtwith then context("+") elseif whatever then context("-") elseif instance then context("!")end
-                ctx_NC() if primitive then ctx_bold(csname) else context(csname) end
+                ctx_NC() if dealtwith  then context("+")
+                     elseif whatever   then context("-")
+                     elseif instance   then context("!")        end
+                ctx_NC() if primitive  then ctx_bold(csname)    else
+                                            context(csname)     end
                 ctx_NC() if parameters then context(parameters > 0 and parameters or "-") end
-                ctx_NC() context(cscommand)
-                ctx_NC() if primitive then context(primitive)  end
-                ctx_NC() if permanent then context(permanent)  end
-                ctx_NC() if frozen    then context(frozen)     end
-                ctx_NC() if immutable then context(immutable)  end
-                ctx_NC() if mutable   then context(mutable)    end
-                ctx_NC() if instance  then context(instance)   end
-                ctx_NC() if noaligned then context(noaligned)  end
-                ctx_NC() if filename  then context(hashnames[filename]) end
+                ctx_NC()                    context(cscommand)
+                ctx_NC() if primitive  then context(primitive)  end
+                ctx_NC() if permanent  then context(permanent)  end
+                ctx_NC() if frozen     then context(frozen)     end
+                ctx_NC() if immutable  then context(immutable)  end
+                ctx_NC() if mutable    then context(mutable)    end
+                ctx_NC() if instance   then context(instance)   end
+                ctx_NC() if noaligned  then context(noaligned)  end
+                ctx_NC() if filename   then context(hashnames[filename]) end
                 ctx_NC() ctx_NR()
                 if visible then
                     total = total + 1
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index a7b27b278..142d53e44 100644
--- a/tex/generic/context/luatex/luatex-fonts-merged.lua
+++ b/tex/generic/context/luatex/luatex-fonts-merged.lua
@@ -1,6 +1,6 @@
 -- merged file : c:/data/develop/context/sources/luatex-fonts-merged.lua
 -- parent file : c:/data/develop/context/sources/luatex-fonts.lua
--- merge date  : 2020-11-17 12:39
+-- merge date  : 2020-11-18 19:13
 
 do -- begin closure to overcome local limits and interference