2017-08-09 15:43:00

28 files changed, 377 insertions, 262 deletions

diff --git a/tex/context/base/mkii/cont-new.mkii b/tex/context/base/mkii/cont-new.mkii
index 7f45484a8..1782f0905 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{2017.08.07 11:30}
+\newcontextversion{2017.08.09 15:35}
 
 %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 b26ab2964..36313bf62 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{2017.08.07 11:30}
+\edef\contextversion{2017.08.09 15:35}
 
 %D For those who want to use this:
 
diff --git a/tex/context/base/mkiv/char-def.lua b/tex/context/base/mkiv/char-def.lua
index 582e60a3d..4efef117f 100644
--- a/tex/context/base/mkiv/char-def.lua
+++ b/tex/context/base/mkiv/char-def.lua
@@ -64469,6 +64469,7 @@ characters.data={
   linebreak="ai",
   mathclass="relation",
   mathname="squaredots",
+  mathlist={ 0x3A, 0x3A },
   unicodeslot=0x2237,
  },
  [0x2238]={
@@ -64488,6 +64489,7 @@ characters.data={
   linebreak="al",
   mathclass="relation",
   mathname="minuscolon",
+  mathlist={ 0x2212, 0x3A },
   unicodeslot=0x2239,
  },
  [0x223A]={
diff --git a/tex/context/base/mkiv/cont-new.mkiv b/tex/context/base/mkiv/cont-new.mkiv
index 336cded49..e518a7094 100644
--- a/tex/context/base/mkiv/cont-new.mkiv
+++ b/tex/context/base/mkiv/cont-new.mkiv
@@ -11,7 +11,7 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-\newcontextversion{2017.08.07 11:30}
+\newcontextversion{2017.08.09 15:35}
 
 %D This file is loaded at runtime, thereby providing an excellent place for
 %D hacks, patches, extensions and new features.
diff --git a/tex/context/base/mkiv/context.mkiv b/tex/context/base/mkiv/context.mkiv
index d662c62a9..f6367f228 100644
--- a/tex/context/base/mkiv/context.mkiv
+++ b/tex/context/base/mkiv/context.mkiv
@@ -41,7 +41,7 @@
 %D up and the dependencies are more consistent.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2017.08.07 11:30}
+\edef\contextversion{2017.08.09 15:35}
 \edef\contextkind   {beta}
 
 %D For those who want to use this:
diff --git a/tex/context/base/mkiv/good-mth.lua b/tex/context/base/mkiv/good-mth.lua
index 661189350..18a97976f 100644
--- a/tex/context/base/mkiv/good-mth.lua
+++ b/tex/context/base/mkiv/good-mth.lua
@@ -15,6 +15,7 @@ local trace_goodies      = false  trackers.register("fonts.goodies", function(v)
 local report_goodies     = logs.reporter("fonts","goodies")
 
 local registerotffeature = fonts.handlers.otf.features.register
+
 local fontgoodies        = fonts.goodies or { }
 
 local fontcharacters     = fonts.hashes.characters
diff --git a/tex/context/base/mkiv/publ-aut.lua b/tex/context/base/mkiv/publ-aut.lua
index cbbdcd9e5..e0f96b9c5 100644
--- a/tex/context/base/mkiv/publ-aut.lua
+++ b/tex/context/base/mkiv/publ-aut.lua
@@ -330,12 +330,14 @@ local ctx_btxsetfirstnames    = context.btxsetfirstnames
 local ctx_btxsetvons          = context.btxsetvons
 local ctx_btxsetsurnames      = context.btxsetsurnames
 local ctx_btxsetjuniors       = context.btxsetjuniors
-local ctx_btxciteauthorsetup  = context.btxciteauthorsetup
-local ctx_btxlistauthorsetup  = context.btxlistauthorsetup
 local ctx_btxsetauthorvariant = context.btxsetauthorvariant
+
 local ctx_btxstartauthor      = context.btxstartauthor
 local ctx_btxstopauthor       = context.btxstopauthor
 
+local ctx_btxciteauthorsetup  = context.btxciteauthorsetup
+local ctx_btxlistauthorsetup  = context.btxlistauthorsetup
+
 local concatstate = publications.concatstate
 local f_invalid   = formatters["<invalid %s: %s>"]
 
diff --git a/tex/context/base/mkiv/publ-imp-aps.lua b/tex/context/base/mkiv/publ-imp-aps.lua
index c15ffe918..f5b33c777 100644
--- a/tex/context/base/mkiv/publ-imp-aps.lua
+++ b/tex/context/base/mkiv/publ-imp-aps.lua
@@ -412,6 +412,10 @@ categories.unpublished = {
 -- like misc below but includes organization.
 
 categories.electronic = {
+    sets = {
+        author = { "author", "collaboration", "organization", },
+        howpublished = { "howpublished", "doi", "url", },
+    },
     required = {
         "title"
     },
@@ -420,8 +424,8 @@ categories.electronic = {
         "year", "month",
         "author",
         "collaboration",
-        "address",
         "organization",
+        "address",
         "howpublished",
         "doi", "url", "note",
     },
@@ -430,6 +434,10 @@ categories.electronic = {
 -- use this type when nothing else fits.
 
 categories.misc = {
+    sets = {
+        author = { "author", "collaboration", },
+        howpublished = { "howpublished", "doi", "url", },
+    },
     required = {
         -- nothing is really important here
     },
diff --git a/tex/context/base/mkiv/publ-imp-aps.mkvi b/tex/context/base/mkiv/publ-imp-aps.mkvi
index e9cbd7aaf..4b810672e 100644
--- a/tex/context/base/mkiv/publ-imp-aps.mkvi
+++ b/tex/context/base/mkiv/publ-imp-aps.mkvi
@@ -551,9 +551,9 @@
 
 \startsetups [btx:aps:list:page-or-pages]
     \ifx\currentbtxlastpage\empty
-        \btxlabeltext{p}.
+        \btxlabeltext{p}
     \else
-        \btxlabeltext{pp}.
+        \btxlabeltext{pp}
     \fi
     \btxnbsp
 \stopsetups
@@ -1040,8 +1040,16 @@
         \btxflush{organization}
         \btxcomma
     }
-    \btxdoif {howpublished} {
+    \btxdoifelse {howpublished} {
         \texdefinition{btx:aps:doi-url} {\btxspace\btxflush{howpublished}}
+    } {
+        \btxdoifelse {doi} {
+            \texdefinition{btx:aps:doi-url} {\btxspace\btxflush{doi}}
+        } {
+            \btxdoif {url} {
+                \texdefinition{btx:aps:doi-url} {\btxspace\btxflush{url}}
+            }
+        }
     }
     \btxleftparenthesis
     \texdefinition{btx:aps:year}
diff --git a/tex/context/base/mkiv/publ-imp-list.mkvi b/tex/context/base/mkiv/publ-imp-list.mkvi
index 68ccaef01..b00c4bd40 100644
--- a/tex/context/base/mkiv/publ-imp-list.mkvi
+++ b/tex/context/base/mkiv/publ-imp-list.mkvi
@@ -13,8 +13,34 @@
 
 \unprotect
 
-\starttexdefinition unexpanded btx:list:inject #content
-    \ifconditional\btxinteractive
+\starttexdefinition unexpanded btx:list:inject:text #content
+    \ifconditional\btxinteractivetext
+        \ifx\currentbtxinternal\empty
+            #content
+        \else
+            \goto {
+                #content
+            } [
+                \s!internal(\currentbtxinternal)
+            ]
+        \fi
+    \else
+        #content
+    \fi
+\stoptexdefinition
+
+\startsetups \s!btx:\s!list:text
+   \texdefinition {\s!btx:\s!list:inject:text} {
+        \btxflushlisttext
+        \ifx\currentbtxcombis\empty \else
+            \btxrenderingparameter\c!separator
+            \btxflushlistcombis
+        \fi
+   }
+\stopsetups
+
+\starttexdefinition unexpanded btx:list:inject:number #content
+    \ifconditional\btxinteractivenumber
         \ifx\currentbtxinternal\empty
             #content
         \else
@@ -33,64 +59,39 @@
     \space
 \stoptexdefinition
 
-\startsetups[\s!btx:\s!list:\s!page]
-    \texdefinition{\s!btx:\s!list:concat}
-    \texdefinition{\s!btx:\s!list:inject} {
-        % real pagenumber: todo, userpage
-        \currentbtxfirst
-        % order
-        \high{\currentbtxsecond}
-    }
-\stopsetups
-
 \startsetups[\s!btx:\s!list:\s!numbering]
-    \texdefinition {\s!btx:\s!list:inject} {
+    \texdefinition {\s!btx:\s!list:inject:number} {
         \currentbtxfirst
         \btxparameter\c!stopper
     }
 \stopsetups
 
-% Hans: can the following setups be condensed to one using some variable?
-
-\startsetups[\s!btx:\s!list:\s!numbering:default]
-    \btxstartstyleandcolor [\currentbtxspecification:\s!list:\s!numbering:default]
-        \btxusecommand[\currentbtxspecification:\s!list:\s!numbering:default] {
+\starttexdefinition unexpanded btx:list:numbering #variant
+    \btxstartstyleandcolor [\currentbtxspecification:\s!list:\s!numbering:#variant]
+        \btxusecommand[\currentbtxspecification:\s!list:\s!numbering:#variant] {
             \fastsetup{\s!btx:\s!list:\s!numbering}
         }
     \btxstopstyleandcolor
+\stoptexdefinition
+
+\startsetups[\s!btx:\s!list:\s!numbering:default]
+    \texdefinition {\s!btx:\s!list:\s!numbering} {default}
 \stopsetups
 
 \startsetups[\s!btx:\s!list:\s!numbering:num]
-    \btxstartstyleandcolor [\currentbtxspecification:\s!list:\s!numbering:num]
-        \btxusecommand[\currentbtxspecification:\s!list:\s!numbering:num] {
-            \fastsetup{\s!btx:\s!list:\s!numbering}
-        }
-    \btxstopstyleandcolor
+    \texdefinition {\s!btx:\s!list:\s!numbering} {num}
 \stopsetups
 
 \startsetups[\s!btx:\s!list:\s!numbering:short]
-    \btxstartstyleandcolor [\currentbtxspecification:\s!list:\s!numbering:short]
-        \btxusecommand [\currentbtxspecification:\s!list:\s!numbering:short] {
-            \fastsetup{\s!btx:\s!list:\s!numbering}
-            \btxflushsuffix
-        }
-    \btxstopstyleandcolor
+    \texdefinition {\s!btx:\s!list:\s!numbering} {short}
 \stopsetups
 
 \startsetups[\s!btx:\s!list:\s!numbering:tag]
-    \btxstartstyleandcolor [\currentbtxspecification:\s!list:\s!numbering:tag]
-        \btxusecommand [\currentbtxspecification:\s!list:\s!numbering:tag] {
-            \fastsetup{\s!btx:\s!list:\s!numbering}
-        }
-    \btxstopstyleandcolor
+    \texdefinition {\s!btx:\s!list:\s!numbering} {tag}
 \stopsetups
 
 \startsetups[\s!btx:\s!list:\s!numbering:index]
-    \btxstartstyleandcolor [\currentbtxspecification:\s!list:\s!numbering:index]
-        \btxusecommand [\currentbtxspecification:\s!list:\s!numbering:index] {
-            \fastsetup{\s!btx:\s!list:\s!numbering}
-        }
-    \btxstopstyleandcolor
+    \texdefinition {\s!btx:\s!list:\s!numbering} {index}
 \stopsetups
 
 \protect
diff --git a/tex/context/base/mkiv/publ-imp-page.mkvi b/tex/context/base/mkiv/publ-imp-page.mkvi
index 2d9040b10..5bcfe6ea3 100644
--- a/tex/context/base/mkiv/publ-imp-page.mkvi
+++ b/tex/context/base/mkiv/publ-imp-page.mkvi
@@ -24,7 +24,7 @@
 \startsetups [\s!btx:\s!list:\s!page]
     \fastsetup{\s!btx:\s!list:\s!page:concat}
     \fastsetup{\s!btx:\currentbtxspecification:\s!list:page-or-pages}
-    \ifconditional\btxinteractive
+    \ifconditional\btxinteractivepage
         \goto {
             \currentbtxfirstpage
         } [
diff --git a/tex/context/base/mkiv/publ-ini.lua b/tex/context/base/mkiv/publ-ini.lua
index 52642c89d..57aaa2bbf 100644
--- a/tex/context/base/mkiv/publ-ini.lua
+++ b/tex/context/base/mkiv/publ-ini.lua
@@ -57,6 +57,8 @@ local enhancers          = publications.enhancers
 local tracers            = publications.tracers or { }
 publications.tracers     = tracers
 
+local setmacro           = interfaces.setmacro   -- todo
+local setcounter         = tex.setcounter        -- todo
 local variables          = interfaces.variables
 
 local v_local            = variables["local"]
@@ -125,7 +127,6 @@ local ctx_btxnumberingsetup       = context.btxnumberingsetup
 local ctx_btxpagesetup            = context.btxpagesetup
 local ctx_btxsetfirst             = context.btxsetfirst
 local ctx_btxsetsecond            = context.btxsetsecond
------ ctx_btxsetthird             = context.btxsetthird
 local ctx_btxsetsuffix            = context.btxsetsuffix
 local ctx_btxsetinternal          = context.btxsetinternal
 local ctx_btxsetlefttext          = context.btxsetlefttext
@@ -373,18 +374,9 @@ do
                                     nofunique = nofunique + 1
                                 end
                                 -- alternative: collect prev in group
-                                local bck = userdata.btxbck
-                                if bck then
-                                    lpegmatch(p_collect,bck,1,entry) -- for s in string.gmatch(bck,"[^ ]+") do listtocite[tonumber(s)] = entry end
-                                    local lst = tonumber(userdata.btxlst)
-                                    if lst then
-                                        listtolist[lst] = entry
-                                    end
-                                else
-                                    local int = tonumber(userdata.btxint)
-                                    if int then
-                                        listtocite[int] = entry
-                                    end
+                                local int = tonumber(userdata.btxint)
+                                if int then
+                                    listtocite[int] = entry
                                 end
                                 local detail = datasets[set].details[tag]
 -- todo: these have to be pluggable
@@ -1591,6 +1583,8 @@ end
 
 -- lists
 
+local renderings = { } --- per dataset
+
 do
 
     publications.lists = publications.lists or { }
@@ -1604,8 +1598,6 @@ do
 
     -- per rendering
 
-    local renderings = { } --- per dataset
-
     setmetatableindex(renderings,function(t,k)
         local v = {
             list         = { },
@@ -2140,6 +2132,18 @@ do
             ctx_btxsetcategory(entry.category or "unknown")
             ctx_btxsettag(tag)
             ctx_btxsetnumber(n)
+            --
+            local citation = citetolist[n]
+            if citation then
+                local references = citation.references
+                if references then
+                    local internal = references.internal
+                    if internal and internal > 0 then
+                        ctx_btxsetinternal(internal)
+                    end
+                end
+            end
+            --
             if language then
                 ctx_btxsetlanguage(language)
             end
@@ -2449,24 +2453,26 @@ do
             for i=1,#source do
                 local entry   = source[i]
                 local current = entry.sortkey -- so we need a sortkey !
-                if entry.suffix then
-                    if not first then
-                        first, last, firstr, lastr = current, current, entry, entry
-                    else
-                        flushrange()
-                        first, last, firstr, lastr = current, current, entry, entry
-                    end
-                else
-                    if not first then
-                        first, last, firstr, lastr = current, current, entry, entry
-                    elseif current == last + 1 then
-                        last, lastr = current, entry
+                if type(sortkey) == "number" then
+                    if entry.suffix then
+                        if not first then
+                            first, last, firstr, lastr = current, current, entry, entry
+                        else
+                            flushrange()
+                            first, last, firstr, lastr = current, current, entry, entry
+                        end
                     else
-                        flushrange()
-                        first, last, firstr, lastr = current, current, entry, entry
+                        if not first then
+                            first, last, firstr, lastr = current, current, entry, entry
+                        elseif current == last + 1 then
+                            last, lastr = current, entry
+                        else
+                            flushrange()
+                            first, last, firstr, lastr = current, current, entry, entry
+                        end
                     end
+                    tags[#tags+1] = entry.tag
                 end
-                tags[#tags+1] = entry.tag
             end
             if first and last then
                 flushrange()
@@ -2524,9 +2530,6 @@ do
         --
         local found, todo, list = findallused(dataset,reference,internal,method == v_text or method == v_always) -- also when not in list
         --
--- inspect(found)
--- inspect(todo)
--- inspect(list)
         if not found or #found == 0 then
             report("no entry %a found in dataset %a",reference,dataset)
         elseif not setup then
@@ -2589,11 +2592,12 @@ do
                     local bl = listtocite[currentcitation]
                     if bl then
                         -- we refer to a coming list entry
-                        ctx_btxsetinternal(bl.references.internal or "")
+                        bl = bl.references.internal
                     else
                         -- we refer to a previous list entry
-                        ctx_btxsetinternal(entry.internal or "")
+                        bl = entry.internal
                     end
+                    ctx_btxsetinternal(bl and bl > 0 and bl or "")
                 end
                 local language = entry.language
                 if language then
@@ -3080,10 +3084,6 @@ do
             ctx_btxstartciteauthor()
             local tag = entry.tag
             ctx_btxsettag(tag)
-         -- local currentcitation = markcite(entry.dataset,tag)
-         -- ctx_btxsetbacklink(currentcitation)
-         -- local bl = listtocite[currentcitation]
-         -- ctx_btxsetinternal(bl and bl.references.internal or "")
             ctx_btxsetfirst(entry[key] or "") -- f_missing(tag)
             if suffix then
                 ctx_btxsetsuffix(entry.suffix)
@@ -3239,7 +3239,10 @@ do
     local function btxlistvariant(dataset,block,tag,variant,listindex)
         local action = listvariants[variant] or listvariants.default
         if action then
-            action(dataset,block,tag,variant,tonumber(listindex) or 0)
+            listindex = tonumber(listindex)
+            if listindex then
+                action(dataset,block,tag,variant,listindex)
+            end
         end
     end
 
@@ -3299,33 +3302,6 @@ do
         ctx_btxnumberingsetup(variant or "short")
     end
 
-    function listvariants.page(dataset,block,tag,variant,listindex)
-        local rendering     = renderings[dataset]
-        local specification = rendering.list[listindex]
-        for i=3,#specification do
-            local backlink = tonumber(specification[i])
-            if backlink then
-                local citation = citetolist[backlink]
-                if citation then
-                    local references = citation.references
-                    if references then
-                        local internal = references.internal
-                        local realpage = references.realpage
-                        if internal and realpage then
-                            ctx_btxsetconcat(i-2)
-                            ctx_btxsetfirst(realpage)
-                            ctx_btxsetsecond(backlink)
-                            if trace_detail then
-                                report("expanding %a list setup %a","page",variant)
-                            end
-                            ctx_btxlistsetup(variant)
-                        end
-                    end
-                end
-            end
-        end
-    end
-
 end
 
 -- a helper
diff --git a/tex/context/base/mkiv/publ-ini.mkiv b/tex/context/base/mkiv/publ-ini.mkiv
index 1a45ec587..a1c76464a 100644
--- a/tex/context/base/mkiv/publ-ini.mkiv
+++ b/tex/context/base/mkiv/publ-ini.mkiv
@@ -68,7 +68,6 @@
 \def\s!btxset       {btxset}
 \def\s!btxref       {btxref}
 \def\s!btxint       {btxint}
-\def\s!btxbck       {btxbck}
 \def\s!btxltx       {btxltx}
 \def\s!btxrtx       {btxrtx}
 \def\s!btxatx       {btxatx}
@@ -356,15 +355,6 @@
 \unexpanded\def\definebtxcommand#1% {body} #1..#n{body}
   {\setuvalue{\??btxcommand\csstring#1}}%
 
-% tracing
-
-\installtextracker
-  {publications.crosslinks}
-  {\let\btx_trace_list_cross\strc_references_tracer}
-  {\let\btx_trace_list_cross\gobbletwoarguments}
-
-\let\btx_trace_list_cross\gobbletwoarguments
-
 % access
 
 \let\currentbtxtag    \empty
@@ -424,13 +414,11 @@
 %D Variables:
 
 \let\currentbtxbacklink     \empty    \unexpanded\def\btxsetbacklink     {\def\currentbtxbacklink}
-\let\currentbtxbacktrace    \empty    \unexpanded\def\btxsetbacktrace    {\def\currentbtxbacktrace}
 \let\currentbtxcategory     \empty    \unexpanded\def\btxsetcategory     {\def\currentbtxcategory}
 \let\currentbtxcombis       \empty    \unexpanded\def\btxsetcombis       {\def\currentbtxcombis}
 \let\currentbtxdataset      \empty    \unexpanded\def\btxsetdataset      {\def\currentbtxdataset}
 \let\currentbtxfirst        \empty    \unexpanded\def\btxsetfirst        {\def\currentbtxfirst}
 \let\currentbtxsecond       \empty    \unexpanded\def\btxsetsecond       {\def\currentbtxsecond}
-%let\currentbtxthird        \empty    \unexpanded\def\btxsetthird        {\def\currentbtxthird}
 \let\currentbtxsuffix       \empty    \unexpanded\def\btxsetsuffix       {\def\currentbtxsuffix}
 \let\currentbtxinternal     \empty    \unexpanded\def\btxsetinternal     {\def\currentbtxinternal}
 \let\currentbtxlefttext     \empty    \unexpanded\def\btxsetlefttext     {\def\currentbtxlefttext}
@@ -477,7 +465,6 @@
    \let\currentbtxbefore   \empty
    \let\currentbtxafter    \empty
    \let\currentbtxbacklink \empty
-   \let\currentbtxbacktrace\empty
    \let\currentbtxlanguage \empty
    \let\currentbtxsuffix   \empty
   %\let\currentbtxdataset  \empty % will always be set
@@ -494,7 +481,6 @@
    \let        \currentbtxbefore     \empty
    \let        \currentbtxafter      \empty
    \let        \currentbtxbacklink   \empty
-   \let        \currentbtxbacktrace  \empty % not used here
    \let        \currentbtxlanguage   \empty
   %\let        \currentbtxdataset    \empty % will always be set, beware of local reset ~
   %\let        \currentbtxtag        \empty % will always be set, beware of local reset ~
@@ -576,6 +562,7 @@
   [\c!prefixstopper=:,
    \c!state=\v!start,
    \c!alternative=a,
+   \c!interaction=\v!none,
   %\c!alternative=\v!paragraph,
   %\c!width=\v!auto,
   %\c!distance=\emwidth,
@@ -635,7 +622,7 @@
       \btxparameter\c!right}%
    \endgroup}
 
-\unexpanded\def\btxpagesetup#1% there will b eno left|right|command|style at this inner level
+\unexpanded\def\btxpagesetup#1% there will be no left|right|command|style at this inner level
   {\begingroup
    \publ_fast_setup\plusfive\s!list\s!page
    \endgroup
@@ -653,6 +640,22 @@
 
 % end of page stuff
 
+\unexpanded\def\btxflushlisttext
+  {\begingroup
+   \usebtxstyleandcolor\c!style\c!color
+   \ignorespaces
+   \publ_fast_setup\plusfour\s!list\currentbtxcategory
+   \removeunwantedspaces
+   \endgroup}
+
+\unexpanded\def\btxflushlistcombis
+  {\begingroup
+   \processcommacommand[\currentbtxcombis]\btx_entry_inject_combi % maybe in lua
+   \endgroup}
+
+\def\btx_entry_inject_list_text
+  {\publ_fast_setup\plusfour\s!list\s!text}
+
 \unexpanded\def\btx_entry_inject
   {\begingroup
    \redoconvertfont % see (**) in strc-lst, this will become an configuration option
@@ -661,19 +664,7 @@
    \ifconditional\c_btx_list_texts
      \currentbtxbefore
    \fi
-   \begingroup
-   \usebtxstyleandcolor\c!style\c!color
-   \ignorespaces
-   \publ_fast_setup\plusfour\s!list\currentbtxcategory
-   \removeunwantedspaces
-   \endgroup
-   \ifx\currentbtxcombis\empty \else
-     \btxrenderingparameter\c!separator
-     % maybe move this loop to lua
-     \begingroup
-       \processcommacommand[\currentbtxcombis]\btx_entry_inject_combi
-     \endgroup
-   \fi
+   \btx_entry_inject_list_text
    \ifconditional\c_btx_list_pages
      \btx_entry_inject_pages
    \fi
@@ -743,6 +734,8 @@
     %
     \iflocation
         \letinteractionparameter\c!style\empty
+%         \letinteractionparameter\c!color\empty
+%         \letinteractionparameter\c!contrastcolor\empty
     \fi
 \to \everybtxlistrendering
 
@@ -976,16 +969,16 @@
    \endgroup}
 
 \def\btx_list_reference_inject_now
-  {\btx_trace_list_cross\empty\currentbtxbacktrace
-   \strc_references_direct_full_user
+  {\strc_references_direct_full_user
       {\ifx\currentbtxdataset\v!default\else\s!btxset=\currentbtxdataset,\fi%
        \s!btxref=\currentbtxtag,%
        \s!btxspc=\currentbtxspecification,%
        \s!btxlst=\number\c_btx_list_reference,% check if needed
-      %\ifx\currentbtxcombis\empty\else\s!btxcom={\currentbtxcombis},\fi%
-       \ifx\currentbtxbefore\empty\else\s!btxbtx={\currentbtxbefore},\fi%
-       \ifx\currentbtxafter \empty\else\s!btxatx={\currentbtxafter },\fi%
-       \ifx\currentbtxbacklink\currentbtxbacktrace\s!btxint=\currentbtxbacklink\else\s!btxbck=\currentbtxbacktrace\fi}%
+      %\ifx\currentbtxcombis  \empty\else\s!btxcom={\currentbtxcombis},\fi%
+       \ifx\currentbtxbefore  \empty\else\s!btxbtx={\currentbtxbefore},\fi%
+       \ifx\currentbtxafter   \empty\else\s!btxatx={\currentbtxafter },\fi%
+       \ifx\currentbtxbacklink\empty\else\s!btxint=\number\currentbtxbacklink\fi
+      }%
       {\s!btx::\v!list::\number\c_btx_list_reference}%
       {\currentbtxnumber}}
 
@@ -998,27 +991,26 @@
      \iftrialtypesetting \else
        \ifx\currentbtxbacklink\empty
          % can be made empty when combining author / year
-       \else
+       \else\ifnum\currentbtxbacklink>\zerocount
          \btx_cite_reference_inject_indeed
          \settrue\c_btx_cite_reference_injected
-       \fi
+       \fi\fi
      \fi
   \fi}
 
 \newtoks\t_btx_reference_inject
 
 \def\btx_cite_reference_inject_indeed
-  {\btx_trace_list_cross\currentbtxbacklink\empty
-   \the\t_btx_reference_inject
+  {\the\t_btx_reference_inject
    \strc_lists_inject_direct % todo: make like \btx_list_reference_inject_now with { }
       [\s!btx]%
       [\c!type=\s!btx]% \c!location=\v!none
       [\ifx\currentbtxdataset\v!default\else\s!btxset=\currentbtxdataset,\fi%
        \s!btxref=\currentbtxtag,%
-      %\ifx\currentbtxcombis\empty\else\s!btxcom={\currentbtxcombis},\fi%
-       \ifx\currentbtxbefore\empty\else\s!btxbtx={\currentbtxbefore},\fi%
-       \ifx\currentbtxafter \empty\else\s!btxatx={\currentbtxafter },\fi%
-       \s!btxint=\number\currentbtxbacklink
+      %\ifx\currentbtxcombis  \empty\else\s!btxcom={\currentbtxcombis},\fi%
+       \ifx\currentbtxbefore  \empty\else\s!btxbtx={\currentbtxbefore},\fi%
+       \ifx\currentbtxafter   \empty\else\s!btxatx={\currentbtxafter },\fi%
+       \ifx\currentbtxbacklink\empty\else\s!btxint=\number\currentbtxbacklink,\fi
        \ifx\currentbtxciteuservariables\empty\else,\currentbtxciteuservariables\fi]}
 
 \def\currentbtxuservariable #1{\clf_btxuservariable        {\currentbtxdataset}{#1}}
@@ -1149,35 +1141,48 @@
 % \btxflushauthor[invertedshort]{author}
 
 % Interaction
+%
+% Because we have more complex entries in lists we don't use the normal list
+% interaction features.
 
 \newconditional\btxinteractive
-\newconditional\btx_interactive
+\newconditional\btxinteractivenumber
+\newconditional\btxinteractivetext
+\newconditional\btxinteractivepage
+
+\let\currentbtxinteraction\empty
+
+\installcorenamespace{btxinteraction}
+
+\setvalue{\??btxinteraction\v!number}{\settrue\btxinteractivenumber}
+\setvalue{\??btxinteraction\v!text  }{\settrue\btxinteractivetext}
+\setvalue{\??btxinteraction\v!page  }{\settrue\btxinteractivepage}
+\setvalue{\??btxinteraction\v!all   }{\settrue\btxinteractivenumber
+                                      \settrue\btxinteractivetext
+                                      \settrue\btxinteractivepage}
 
-% of maybe modes?
+% \setupbtx[interaction=page] % or text or number or all
+% \setupbtxrendering[pagestate=start]
 
 \appendtoks
     \iflocation
-        \edef\p_interaction{\btxparameter\c!interaction}%
-        \ifx\p_interaction\v!stop
+        \edef\currentbtxinteraction{\btxparameter\c!interaction}%
+        \ifx\currentbtxinteraction\v!stop
             \setfalse\btxinteractive
         \else
+            \let\structurelistlocation\empty
             \settrue\btxinteractive
-            \ifx\p_interaction\v!all
-                \settrue\btx_interactive
-            \else
-                \setfalse\btx_interactive
-            \fi
+            \begincsname\??btxinteraction\currentbtxinteraction\endcsname
         \fi
     \else
         \setfalse\btxinteractive
-        \setfalse\btx_interactive
     \fi
 \to \everysetupbtxlistplacement
 
 \appendtoks
     \iflocation
-        \edef\p_interaction{\btxparameter\c!interaction}%
-        \ifx\p_interaction\v!stop
+        \edef\currentbtxinteraction{\btxparameter\c!interaction}%
+        \ifx\currentbtxinteraction\v!stop
             \setfalse\btxinteractive
         \else
             \settrue\btxinteractive
diff --git a/tex/context/base/mkiv/spac-chr.lua b/tex/context/base/mkiv/spac-chr.lua
index 76e3e14f2..299f86ad6 100644
--- a/tex/context/base/mkiv/spac-chr.lua
+++ b/tex/context/base/mkiv/spac-chr.lua
@@ -135,6 +135,7 @@ local function nbsp(head,current)
         setsubtype(current,space_skip_code)
     else
         head, current = inject_nobreak_space(0x00A0,head,current,para.space,para.spacestretch,para.spaceshrink)
+        setsubtype(current,space_skip_code)
     end
     return head, current
 end
diff --git a/tex/context/base/mkiv/status-files.pdf b/tex/context/base/mkiv/status-files.pdf
index 010feba5d..e820737c7 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 8223279b2..76ebe0c1b 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-doc.lua b/tex/context/base/mkiv/strc-doc.lua
index 57fff5a21..93d8db56b 100644
--- a/tex/context/base/mkiv/strc-doc.lua
+++ b/tex/context/base/mkiv/strc-doc.lua
@@ -129,8 +129,8 @@ sections.tobesaved  = tobesaved
 --
 -- job.register('structures.sections.collected', tobesaved, initializer)
 
-sections.registered = sections.registered or allocate()
-local registered    = sections.registered
+local registered    = sections.registered or allocate()
+sections.registered = registered
 
 storage.register("structures/sections/registered", registered, "structures.sections.registered")
 
@@ -411,11 +411,6 @@ function sections.setentry(given)
             v[2](k)
         end
     end
---     local n = { }
---     for i=1,newdepth do
---         n[i] = numbers[i]
---     end
---     numberdata.numbers = n
     numberdata.numbers = { unpack(numbers,1,newdepth) }
     if not numberdata.block then
         numberdata.block = getcurrentblock() -- also in references
@@ -447,8 +442,9 @@ function sections.reportstructure()
         local d = status[depth]
         local o = concat(ownnumbers,".",1,depth)
         local n = (numbers and concat(numbers,".",1,min(depth,#numbers))) or 0
-        local l = d.titledata.title or ""
-        local t = (l ~= "" and l) or d.titledata.title or "[no title]"
+        local t = d.titledata.title
+        local l = t or ""
+        local t = (l ~= "" and l) or t or "[no title]"
         local m = d.metadata.name
         if o and not find(o,"^%.*$") then
             report_structure("%s @ level %i : (%s) %s -> %s",m,depth,n,o,t)
@@ -460,17 +456,24 @@ function sections.reportstructure()
     end
 end
 
+-- function sections.setnumber(depth,n)
+--     local forced, depth, new = data.forced, depth or data.depth, tonumber(n) or 0
+--     if type(n) == "string" then
+--         if find(n,"^[%+%-]") then
+--             forced[depth] = { "add", new }
+--         else
+--             forced[depth] = { "set", new }
+--         end
+--     else
+--         forced[depth] = { "set", new }
+--     end
+-- end
+
 function sections.setnumber(depth,n)
-    local forced, depth, new = data.forced, depth or data.depth, tonumber(n)
-    if type(n) == "string" then
-        if find(n,"^[%+%-]") then
-            forced[depth] = { "add", new }
-        else
-            forced[depth] = { "set", new }
-        end
-    else
-        forced[depth] = { "set", new }
-    end
+    data.forced[depth or data.depth] = {
+        type(n) == "string" and find(n,"^[%+%-]") and "add" or "set",
+        tonumber(n) or 0
+    }
 end
 
 function sections.numberatdepth(depth)
@@ -774,10 +777,13 @@ function sections.typesetnumber(entry,kind,...) -- kind='section','number','pref
                         if number then
                             local ownnumber = ownnumbers and ownnumbers[index] or ""
                             if number > 0 or (ownnumber ~= "") then
-                                if bb == 0 then bb = k end
+                                if bb == 0 then
+                                    bb = k
+                                end
                                 ee = k
-                            else
-                                bb, ee = 0, 0
+                            elseif criterium >= 0 then
+                                bb = 0
+                                ee = 0
                             end
                         else
                             break
@@ -1028,7 +1034,7 @@ implement { name = "namedstructureuservariable", actions = sections.userdata,
 
 implement { name = "setstructurelevel",          actions = sections.setlevel,        arguments = { "string", "string" } }
 implement { name = "getstructurelevel",          actions = sections.getcurrentlevel, arguments = { "string" } }
-implement { name = "setstructurenumber",         actions = sections.setnumber,       arguments = { "integer", "string" } }
+implement { name = "setstructurenumber",         actions = sections.setnumber,       arguments = { "integer", "string" } } -- string as we support +-
 implement { name = "getstructurenumber",         actions = sections.getnumber,       arguments = { "integer" } }
 implement { name = "getsomestructurenumber",     actions = sections.getnumber,       arguments = { "integer", "string" } }
 implement { name = "getfullstructurenumber",     actions = sections.fullnumber,      arguments = { "integer" } }
@@ -1099,6 +1105,7 @@ implement {
                     { "segments" },
                     { "ownnumber" },
                     { "language" },
+                    { "criterium" },
                 },
             },
             { "userdata" },
diff --git a/tex/context/base/mkiv/strc-lst.mkvi b/tex/context/base/mkiv/strc-lst.mkvi
index 08e56a700..392d92aea 100644
--- a/tex/context/base/mkiv/strc-lst.mkvi
+++ b/tex/context/base/mkiv/strc-lst.mkvi
@@ -1452,40 +1452,7 @@
      \strc_lists_interaction_check_nop
    \fi}
 
-% \def\strc_lists_interaction_check_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
-%      \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
+\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
@@ -1496,13 +1463,13 @@
      \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
+     \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
+     \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
@@ -1512,13 +1479,31 @@
      \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
+     \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
+     \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
+  {\ifx\currentlistentrylocation\empty
+     \strc_lists_interaction_check_yes_nop
+   \else\ifnum\currentlistentrylocation=\zerocount
+     \strc_lists_interaction_check_yes_nop
+   \else
+     \strc_lists_interaction_check_yes_yes
+   \fi\fi}
+
 \def\strc_lists_interaction_check_nop
   {\let\strc_lists_get_reference_attribute  \gobbleoneargument
    \let\strc_lists_set_reference_attribute  \gobbleoneargument
diff --git a/tex/context/base/mkiv/strc-ref.mkvi b/tex/context/base/mkiv/strc-ref.mkvi
index 69a9e2219..2cd08f437 100644
--- a/tex/context/base/mkiv/strc-ref.mkvi
+++ b/tex/context/base/mkiv/strc-ref.mkvi
@@ -2252,27 +2252,6 @@
 %D \in{figure}[match(mess)]
 %D \stoptyping
 
-%D Tracing:
-
-\unexpanded\def\strc_references_tracer#1#2% \csleft csright
-  {\hbox to \zeropoint \bgroup
-     \hss
-     \infofont
-     \darkblue
-     \ifx#1\empty\else
-         \raise\strutht \hbox \s!to \zeropoint \bgroup
-           \hss#1\hskip.2\emwidth
-         \egroup
-     \fi
-     \vrule \s!height 1.5\strutht \s!depth \strutdp \s!width .1\emwidth
-     \ifx#2\empty\else
-       \raise\strutht \hbox \s!to \zeropoint \bgroup
-         \hskip.2\emwidth#2\hss
-       \egroup
-     \fi
-     \hss
-   \egroup}%
-
 \protect \endinput
 
 % tricky:
diff --git a/tex/context/base/mkiv/strc-sec.mkiv b/tex/context/base/mkiv/strc-sec.mkiv
index af8ba5ba1..efed4d896 100644
--- a/tex/context/base/mkiv/strc-sec.mkiv
+++ b/tex/context/base/mkiv/strc-sec.mkiv
@@ -86,7 +86,8 @@
    \c!sectionset=\headparameter\c!sectionset,
    \c!sectionsegments=\headparameter\c!sectionsegments,
    \c!reference=\headparameter\c!reference,
-   \c!referenceprefix=\headparameter\c!referenceprefix]
+   \c!referenceprefix=\headparameter\c!referenceprefix,
+   \c!criterium=\headparameter\c!criterium]
 
 % see lists/neat-001.tex for usage of:
 
@@ -112,7 +113,14 @@
    \globallet\currentstructurebookmark\tempstring
    \endgroup}
 
-% so it's an experiment
+% zeros:
+%
+% \setuphead[subsection][criterium=all]
+%
+% \dorecurse{3} {
+%     \chapter{Blabla}                 \subsection{bla 1 1} \subsection{bla 1 2}
+%                      \section{bla 2} \subsection{bla 2 1} \subsection{bla 2 2}
+% }
 
 \unexpanded\def\strc_sectioning_register#1#2#3% #1=interfaced-settings, #2=optional user data (not yet supported)
   {\begingroup
@@ -236,6 +244,7 @@
             segments      {\structureparameter\c!sectionsegments}
             ownnumber     {\currentstructureownnumber}
             language      {\currentlanguage}% for the moment, needed for bookmarks conversion
+            criterium     {\structureparameter\c!criterium}
         }
         userdata {\detokenize{#3}}% will be converted to table at the lua end
    \relax
diff --git a/tex/context/interface/mkiv/context-en.xml b/tex/context/interface/mkiv/context-en.xml
index fc18b8cc3..01dcd6aba 100644
--- a/tex/context/interface/mkiv/context-en.xml
+++ b/tex/context/interface/mkiv/context-en.xml
@@ -32160,6 +32160,9 @@
   </cd:command>
   <cd:command category="bibliography" file="publ-tra.mkiv" name="showbtxdatasetfields">
    <cd:arguments>
+    <cd:keywords optional="yes">
+     <cd:constant type="cd:name"/>
+    </cd:keywords>
     <cd:assignments list="yes" optional="yes">
      <cd:parameter name="specification">
       <cd:constant type="cd:name"/>
@@ -32212,6 +32215,9 @@
   </cd:command>
   <cd:command category="bibliography" file="publ-tra.mkiv" name="showbtxdatasetcompleteness">
    <cd:arguments>
+    <cd:keywords optional="yes">
+     <cd:constant type="cd:name"/>
+    </cd:keywords>
     <cd:assignments list="yes" optional="yes">
      <cd:parameter name="specification">
       <cd:constant type="cd:name"/>
diff --git a/tex/context/interface/mkiv/i-context.pdf b/tex/context/interface/mkiv/i-context.pdf
index 97fffd674..29141d1e3 100644
--- a/tex/context/interface/mkiv/i-context.pdf
+++ b/tex/context/interface/mkiv/i-context.pdf
diff --git a/tex/context/interface/mkiv/i-publication.xml b/tex/context/interface/mkiv/i-publication.xml
index d981c4acd..da308d1ad 100644
--- a/tex/context/interface/mkiv/i-publication.xml
+++ b/tex/context/interface/mkiv/i-publication.xml
@@ -1026,6 +1026,7 @@
 
     <cd:command name="showbtxdatasetfields" category="bibliography" file="publ-tra.mkiv">
         <cd:arguments>
+            <cd:resolve name="keyword-name-optional"/>
             <cd:assignments list="yes" optional="yes">
                 <cd:parameter name="specification">
                     <cd:constant type="cd:name"/>
@@ -1048,6 +1049,7 @@
 
     <cd:command name="showbtxdatasetcompleteness" category="bibliography" file="publ-tra.mkiv">
         <cd:arguments>
+            <cd:resolve name="keyword-name-optional"/>
             <cd:assignments list="yes" optional="yes">
                 <cd:parameter name="specification">
                     <cd:constant type="cd:name"/>
diff --git a/tex/context/interface/mkiv/i-readme.pdf b/tex/context/interface/mkiv/i-readme.pdf
index f8510015c..7e708175d 100644
--- a/tex/context/interface/mkiv/i-readme.pdf
+++ b/tex/context/interface/mkiv/i-readme.pdf
diff --git a/tex/context/modules/mkiv/s-math-characters.lua b/tex/context/modules/mkiv/s-math-characters.lua
index efecbeeb5..1888dabb4 100644
--- a/tex/context/modules/mkiv/s-math-characters.lua
+++ b/tex/context/modules/mkiv/s-math-characters.lua
@@ -16,6 +16,8 @@ local lower = string.lower
 local utfchar = utf.char
 local round = math.round
 
+local context        = context
+
 local fontdata       = fonts.hashes.identifiers
 local chardata       = characters.data
 local blocks         = characters.blocks
diff --git a/tex/context/modules/mkiv/s-math-ligatures.lua b/tex/context/modules/mkiv/s-math-ligatures.lua
new file mode 100644
index 000000000..16fe0c4bc
--- /dev/null
+++ b/tex/context/modules/mkiv/s-math-ligatures.lua
@@ -0,0 +1,71 @@
+if not modules then modules = { } end modules['s-math-ligatures'] = {
+    version   = 1.001,
+    comment   = "companion to s-math-ligatures.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+moduledata.math           = moduledata.math           or { }
+moduledata.math.ligatures = moduledata.math.ligatures or { }
+
+local context = context
+
+local utfchar = utf.char
+local uformat = string.formatters["%U"]
+
+function moduledata.math.ligatures.showlist(specification)
+ -- specification = interfaces.checkedspecification(specification)
+
+    local function setlist(unicode,list,start,v)
+        if list[start] ~= 0x20 then
+            local t, u = { }, { }
+            for i=start,#list do
+                local li = list[i]
+                t[#t+1] = utfchar(li)
+                u[#u+1] = uformat(li)
+            end
+            context.NC() context("%U",unicode)
+            context.NC() context("%c",unicode)
+            context.NC() context("% t",u)
+            context.NC() context("%t",t)
+            context.NC() context("%t",t)
+            context.NC()
+            context.nohyphens()
+            context.veryraggedright()
+            local n = v.mathname
+            if n then
+                context.tex(n)
+            else
+                local c = v.mathspec
+                if c then
+                    for i=1,#c do
+                        local n = c[i].name
+                        if n then
+                            context.tex(n)
+                            context.quad()
+                        end
+                    end
+                end
+            end
+            context.NC()
+            context.NR()
+        end
+    end
+
+    context.starttabulate { "|T|m|T|T|m|pl|" }
+    for unicode, v in table.sortedhash(characters.data) do
+        local vs = v.specials
+        if vs and #vs > 2 then
+            local kind = vs[1]
+            if (v.mathclass or v.mathspec) and (kind == "char" or kind == "compat") then
+                setlist(unicode,vs,2,v)
+            end
+        end
+        local ml = v.mathlist
+        if ml then
+            setlist(unicode,ml,1,v)
+        end
+    end
+    context.stoptabulate()
+end
diff --git a/tex/context/modules/mkiv/s-math-ligatures.mkiv b/tex/context/modules/mkiv/s-math-ligatures.mkiv
new file mode 100644
index 000000000..39fc4d2a3
--- /dev/null
+++ b/tex/context/modules/mkiv/s-math-ligatures.mkiv
@@ -0,0 +1,50 @@
+%D \module
+%D   [      file=s-math-ligatures.mkiv,
+%D        version=2017.08.03,
+%D          title=\CONTEXT\ Style File,
+%D       subtitle=Math Ligature Checking,
+%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.
+
+\startmodule[math-ligatures]
+
+\registerctxluafile{s-math-ligatures}{}
+
+\unprotect
+
+\unexpanded\def\showmathligatures
+  {\dosingleempty\module_math_ligatures_show}
+
+\def\module_math_ligatures_show[#1]%
+  {\begingroup
+   \ctxlua{moduledata.math.ligatures.showlist{ }}%
+   \endgroup}
+
+\protect
+
+\stopmodule
+
+\continueifinputfile{s-math-ligatures.mkiv}
+
+\setupbodyfont[dejavu,10pt]
+
+\setuplayout
+  [width=middle,
+   height=middle,
+   topspace=15mm,
+   backspace=15mm,
+   bottomspace=15mm,
+   header=1cm,
+   headerdistance=0.5cm,
+   footer=0pt]
+
+\starttext
+
+    \showmathligatures
+
+\stoptext
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index 7624ff77b..8b25160bf 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  : 08/07/17 11:30:07
+-- merge date  : 08/09/17 15:35:46
 
 do -- begin closure to overcome local limits and interference