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+%D \module
+%D   [       file=lxml-ini,
+%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 Todo: auto apply setups (manage at lua end)
+%D Todo: manuak: \xmlinclusion \xmlinclusions
+
+\writestatus{loading}{ConTeXt XML Support / Initialization}
+
+%registerctxluafile{lxml-tab}{1.001} % loader
+%registerctxluafile{lxml-lpt}{1.001} % parser
+%registerctxluafile{lxml-xml}{1.001} % xml finalizers
+%registerctxluafile{lxml-aux}{1.001} % extras using parser
+%registerctxluafile{lxml-mis}{1.001} % extras independent of parser
+\registerctxluafile{lxml-ent}{1.001} % entity hacks
+\registerctxluafile{lxml-tex}{1.001} % tex finalizers
+\registerctxluafile{lxml-dir}{1.001} % ctx hacks
+\registerctxluafile{lxml-ini}{1.001} % interface
+
+\unprotect
+
+% todo: { } mandate so that we can alias
+
+% undocumented:
+
+\def\ctxlxml                #1{\ctxlua{lxml.#1}}
+
+% for now indirect
+
+\def\xmlconcat          #1#2#3{\clf_xmlconcat           {#1}{#2}{\detokenize{#3}}}
+\def\xmlconcatrange #1#2#3#4#5{\clf_xmlconcatrange      {#1}{#2}{#3}{#4}{\detokenize{#5}}}
+\def\xmlload              #1#2{\clf_xmlload             {#1}{#2}{\directxmlparameter\c!compress}}
+\def\xmlloadbuffer        #1#2{\clf_xmlloadbuffer       {#1}{#2}{\directxmlparameter\c!compress}}
+\def\xmlloaddata          #1#2{\clf_xmlloaddata         {#1}{#2}{\directxmlparameter\c!compress}}
+
+% aliased
+
+\let\xmlall                    \clf_xmlall
+\let\xmlatt                    \clf_xmlatt
+\let\xmlattdef                 \clf_xmlattdef
+\let\xmlattribute              \clf_xmlattribute
+\let\xmlattributedef           \clf_xmlattributedef
+\let\xmlchainatt               \clf_xmlchainatt
+\let\xmlchainattdef            \clf_xmlchainattdef
+\let\xmlchecknamespace         \clf_xmlchecknamespace
+\let\xmlcommand                \clf_xmlcommand
+\let\xmlcontext                \clf_xmlcontext
+\let\xmlcount                  \clf_xmlcount
+\let\xmldelete                 \clf_xmldelete
+\let\xmldirect                 \clf_xmldirect             % in loops, not dt but root
+\let\xmldirectives             \clf_xmldirectives
+\let\xmldirectivesafter        \clf_xmldirectivesafter
+\let\xmldirectivesbefore       \clf_xmldirectivesbefore
+\let\xmldisplayverbatim        \clf_xmldisplayverbatim
+\let\xmlelement                \clf_xmlelement
+\let\xmlfilter                 \clf_xmlfilter
+\let\xmlfilterlist             \clf_xmlfilterlist
+\let\xmlfirst                  \clf_xmlfirst
+\let\xmlflush                  \clf_xmlflush
+\let\xmlflushcontext           \clf_xmlflushcontext
+\let\xmlflushlinewise          \clf_xmlflushlinewise
+\let\xmlflushpure              \clf_xmlflushpure
+\let\xmlflushspacewise         \clf_xmlflushspacewise
+\let\xmlflushtext              \clf_xmlflushtext
+\let\xmlfunction               \clf_xmlfunction
+\let\xmlinclude                \clf_xmlinclude
+\let\xmlincludeoptions         \clf_xmlincludeoptions
+\let\xmlinclusion              \clf_xmlinclusion
+\let\xmlinclusions             \clf_xmlinclusions
+\let\xmlbadinclusions          \clf_xmlbadinclusions
+\let\xmlindex                  \clf_xmlindex
+\let\xmlinlineverbatim         \clf_xmlinlineverbatim
+\let\xmllast                   \clf_xmllast
+\let\xmllastatt                \clf_xmllastatt
+\let\xmllastmatch              \clf_xmllastmatch
+\let\xmlloaddirectives         \clf_xmlloaddirectives
+\let\xmlmain                   \clf_xmlmain
+\let\xmlmatch                  \clf_xmlmatch
+\let\xmlname                   \clf_xmlname
+\let\xmlnamespace              \clf_xmlnamespace
+\let\xmlnonspace               \clf_xmlnonspace
+\let\xmlpath                   \clf_xmlpath
+\let\xmlpos                    \clf_xmlpos
+\let\xmlposition               \clf_xmlindex
+\let\xmlpure                   \clf_xmlpure
+\let\xmlraw                    \clf_xmlraw
+\let\xmlrefatt                 \clf_xmlrefatt
+\let\xmlregisterns             \clf_xmlregisterns         % document
+\let\xmlremapname              \clf_xmlremapname          % element
+\let\xmlremapnamespace         \clf_xmlremapnamespace     % document
+\let\xmlsave                   \clf_xmlsave
+\let\xmlsetsetup               \clf_xmlsetsetup
+\let\xmlsnippet                \clf_xmlsnippet
+\let\xmlstrip                  \clf_xmlstrip
+\let\xmlstripanywhere          \clf_xmlstripanywhere
+\let\xmlstripnolines           \clf_xmlstripnolines
+\let\xmlstripped               \clf_xmlstripped
+\let\xmlstrippednolines        \clf_xmlstrippednolines
+\let\xmltag                    \clf_xmltag
+\let\xmltext                   \clf_xmltext
+\let\xmltobuffer               \clf_xmltobuffer           % id pattern name
+\let\xmltobufferverbose        \clf_xmltobufferverbose    % id pattern name
+\let\xmltofile                 \clf_xmltofile             % id pattern filename
+\let\xmltoparameters           \clf_xmltoparameters
+\let\xmlverbatim               \clf_xmlverbatim
+
+\unexpanded\def\xmlinfo                #1{\hbox{\ttxx[\clf_xmlname{#1}]}}
+\unexpanded\def\xmlshow                #1{\startpacked\ttx\xmlverbatim{#1}\stoppacked}
+
+% the next one is handy for mode runs because it enforces a consistent
+% #1 indexing (needed when using \xmltext{main:123}{...} like calls
+
+\let\xmladdindex               \clf_xmladdindex
+
+% we need to pass the last argument as function, so
+
+\unexpanded\def\xmlsetfunction#1#2#3{\ctxcommand{xmlsetfunction("#1",\!!bs#2\!!es,#3)}}
+
+% goodie:
+
+\unexpanded\def\xmlprettyprint#1#2%
+  {\xmltobufferverbose{#1}{.}{xml-temp}%
+   \ifdefined\scitebuffer
+     \scitebuffer[#2][xml-temp]%
+   \else
+     \typebuffer[xml-temp][\c!option=#2]%
+   \fi}
+
+% kind of special:
+
+\let\xmlstartraw\clf_xmlstartraw
+\let\xmlstopraw \clf_xmlstopraw
+
+\let\startxmlraw\clf_xmlstartraw
+\let\stopxmlraw \clf_xmlstopraw
+
+% these are expandable! todo: \xmldoifelseattribute
+
+\let\xmldoif              \clf_xmldoif
+\let\xmldoifnot           \clf_xmldoifnot
+\let\xmldoifelse          \clf_xmldoifelse
+\let\xmldoiftext          \clf_xmldoiftext
+\let\xmldoifnottext       \clf_xmldoifnottext
+\let\xmldoifelsetext      \clf_xmldoifelsetext
+
+\let\xmldoifempty         \clf_xmldoifempty
+\let\xmldoifnotempty      \clf_xmldoifnotempty
+\let\xmldoifelseempty     \clf_xmldoifelseempty
+\let\xmldoifselfempty     \clf_xmldoifselfempty
+\let\xmldoifnotselfempty  \clf_xmldoifnotselfempty
+\let\xmldoifelseselfempty \clf_xmldoifelseselfempty
+
+\let\xmldoiftextelse      \xmldoifelsetext
+\let\xmldoifemptyelse     \xmldoifelseempty
+\let\xmldoifselfemptyelse \xmldoifelseselfempty
+
+% \startxmlsetups xml:include
+%     \xmlinclude{main}{include}{filename|href}
+% \stopxmlsetups
+%
+% \xmlprependsetup{xml:include}
+
+% \let\xmlgrab\xmlsetsetup % obsolete
+% \let\xmlself\s!unknown   % obsolete
+
+\let\xmlsetup\setupwithargumentswapped
+\let\xmls    \setupwithargumentswapped % hardly any faster
+\let\xmlw    \setupwithargument        % hardly any faster
+
+% todo: 1:xml:whatever always before 3:xml:something
+
+\unexpanded\def\xmlprependsetup            #1{\clf_xmlprependsetup{*}{#1}}
+\unexpanded\def\xmlappendsetup             #1{\clf_xmlappendsetup {*}{#1}}
+\unexpanded\def\xmlbeforesetup           #1#2{\clf_xmlbeforesetup {*}{#1}{#2}}
+\unexpanded\def\xmlaftersetup            #1#2{\clf_xmlaftersetup  {*}{#1}{#2}}
+\unexpanded\def\xmlremovesetup             #1{\clf_xmlremovesetup {*}{#1}}
+\unexpanded\def\xmlresetsetups               {\clf_xmlresetsetups {*}}
+
+\unexpanded\def\xmlprependdocumentsetup  #1#2{\clf_xmlprependsetup{#1}{#2}}
+\unexpanded\def\xmlappenddocumentsetup   #1#2{\clf_xmlappendsetup {#1}{#2}}
+\unexpanded\def\xmlbeforedocumentsetup #1#2#3{\clf_xmlbeforesetup {#1}{#2}{#3}}
+\unexpanded\def\xmlafterdocumentsetup  #1#2#3{\clf_xmlaftersetup  {#1}{#2}{#3}}
+\unexpanded\def\xmlremovedocumentsetup   #1#2{\clf_xmlremovesetup {#1}{#2}}
+\unexpanded\def\xmlresetdocumentsetups     #1{\clf_xmlresetsetups {#1}}
+
+\unexpanded\def\xmlflushdocumentsetups   #1#2{\clf_xmlflushsetups {#1}{*}{#2}} % #1 == id where to apply * and #2
+
+\let\xmlregistersetup        \xmlappendsetup
+\let\xmlregisterdocumentsetup\xmlappenddocumentsetup
+
+\def\xmldocument{main}
+
+\unexpanded\def\xmlregisteredsetups
+  {\xmlstarttiming
+   \xmlflushsetups
+   \xmldefaulttotext\xmldocument % after include
+   \xmlstoptiming}
+
+\unexpanded\def\xmlregistereddocumentsetups#1#2% id setups
+  {\xmlstarttiming
+   % todo: test for duplicates !
+   \xmlflushdocumentsetups{#1}{#2}%
+   \xmldefaulttotext{#1}% after include
+   \xmlstoptiming}
+
+\unexpanded\def\xmlstarttiming{\clf_xmlstarttiming} % undocumented
+\unexpanded\def\xmlstoptiming {\clf_xmlstoptiming}  % undocumented
+
+\def\lxml_process#1#2#3#4#5% flag \loader id name what initializersetup
+  {\begingroup
+   \edef\xmldocument{#3}% #2 can be \xmldocument and set as such
+   %xmlpushdocument{#3}%
+   #2{#3}{#4}%
+   \setcatcodetable\notcatcodes
+   \doifelsenothing{#5}
+     {\xmlsetup{#3}{xml:process}}
+     {\xmlsetup{#3}{#5}}%
+   %xmlpopdocument
+   \endgroup}
+
+\unexpanded\def\xmlprocessfile      {\lxml_process\plusone  \xmlload}
+\unexpanded\def\xmlprocessdata      {\lxml_process\zerocount\xmlloaddata}
+\unexpanded\def\xmlprocessbuffer    {\lxml_process\zerocount\xmlloadbuffer}
+           \let\xmlprocess           \xmlprocessfile
+
+\startxmlsetups xml:flush
+    \xmlflush{#1}
+\stopxmlsetups
+
+\startxmlsetups xml:process
+    \xmlregistereddocumentsetups{#1}{#1}
+    \xmlmain{#1}
+\stopxmlsetups
+
+\unexpanded\def\xmlloadonly#1#2#3%
+  {\xmlload{#1}{#2}%
+   \xmlregistereddocumentsetups{#1}{#3}}
+
+% replaced by concat
+%
+% \unexpanded\def\xmlconnect#1#2#3% inefficient
+%   {\scratchcounter\xmlcount{#1}{#2}\relax
+%    \ifcase\scratchcounter \or
+%      \xmlall{#1}{#2}%
+%    \else
+%      \dorecurse \scratchcounter
+%        {\ifnum\recurselevel>\plusone#3\fi
+%         \xmlidx{#1}{#2}\recurselevel}%
+%    \fi}
+
+\unexpanded\def\xmlcdataobeyedline {\obeyedline}
+\unexpanded\def\xmlcdataobeyedspace{\strut\obeyedspace}
+\unexpanded\def\xmlcdatabefore     {\begingroup\tt}
+\unexpanded\def\xmlcdataafter      {\endgroup}
+
+% verbatim (dodo:pre/post whitespace, maybe splot verbatim and
+% cdata commands), experimental:
+%
+% \xmlsetfunction{main}{verbatim}{lxml.displayverbatim}
+% \xmlsetfunction{main}{verb}    {lxml.inlineverbatim}
+
+% we use an xml: namespace so one has to define a suitable verbatim, say
+%
+% \definetyping[xml:verbatim][typing]
+%
+% this is experimental!
+
+\unexpanded\def\startxmldisplayverbatim
+  {\dosingleempty\lxml_start_display_verbatim}
+
+\def\lxml_start_display_verbatim[#1]%
+  {\startpacked
+   \edef\currenttyping{#1}%
+   \ifx\currenttyping\empty
+     \let\currenttyping\v!typing
+   \else % maybe test for existence
+     \edef\currenttyping{xml:\currenttyping}%
+   \fi
+   \unexpanded\def\stopxmldisplayverbatim
+     {\endofverbatimlines
+      \stoppacked}
+   \doinitializeverbatim
+   \beginofverbatimlines}
+
+\unexpanded\def\startxmlinlineverbatim
+  {\dosingleempty\lxml_start_inline_verbatim}
+
+\unexpanded\def\lxml_start_inline_verbatim[#1]%
+  {\begingroup
+   \edef\currenttype{#1}%
+   \ifx\currenttype\empty
+     \let\currenttype\v!type
+   \else % maybe test for existence
+     \edef\currenttype{xml:\currenttype}%
+   \fi
+   \let\stopxmlinlineverbatim\endgroup
+   \doinitializeverbatim}
+
+% processing instructions
+
+\unexpanded\def\xmlinstalldirective#1#2%
+  {\clf_xmlinstalldirective{#1}{\csstring#2}}
+
+% \def\xmlcontextdirective#1% kind class key value
+%   {\executeifdefined{xml#1directive}\gobblethreearguments}
+
+% setting up xml:
+%
+% \setupxml[\c!default=]        % mkiv only == text
+% \setupxml[\c!default=\v!none] % mkiv only, undefined -> hidden
+% \setupxml[\c!default=\v!text] % mkiv only, undefined -> text
+
+% \def\xmlctxdirective#1#2#3{\doif{#1}{clue}{\doif{#2}{page}}{\page[#3]}}
+
+\newconstant\xmlprocessingmode % 0=unset, 1=text, 2=hidden
+
+\installcorenamespace{xml}
+\installcorenamespace{xmldefaults}
+\installcorenamespace{xmlmapvalue}
+
+\installdirectcommandhandler \??xml {xml}
+
+\letvalue{\??xmldefaults\v!normal}\zerocount
+\letvalue{\??xmldefaults\v!none  }\zerocount
+\letvalue{\??xmldefaults\v!text  }\plusone
+\letvalue{\??xmldefaults\v!hidden}\plustwo
+
+\unexpanded\def\xmldefaulttotext
+  {\ifcase\xmlprocessingmode
+     \expandafter\gobbleoneargument       % 0 (none)
+   \or
+     \expandafter\clf_xmlsetcommandtotext % 1 (normal)
+   \or
+     \expandafter\clf_xmlsetcommandtonone % 2 (hidden)
+   \else
+     \expandafter\gobbleoneargument       %   (none)
+   \fi}
+
+\appendtoks
+    \xmlprocessingmode\executeifdefined{\??xmldefaults\directxmlparameter\c!default}\plusone
+\to \everysetupxml
+
+\setupxml
+  [\c!default=,          % flush all
+   \c!compress=\v!no,    % strip comment
+   \c!entities=\v!no]    % load big entity file
+
+\appendtoks
+    \doif{\directxmlparameter\c!entities}\clf_xmlloadentities
+\to \everysetupxml
+
+\def\xmlmapvalue    #1#2#3{\setvalue{\??xmlmapvalue#1:#2}{#3}} % keep #3 to grab spaces
+\def\xmldoifelsevalue #1#2{\ifcsname\??xmlmapvalue#1:#2\endcsname\expandafter\firstoftwoarguments\else\expandafter\secondoftwoarguments\fi}
+
+\def\xmlvalue#1#2% #3
+  {\ifcsname\??xmlmapvalue#1:#2\endcsname
+     \expandafter\expandafter\expandafter\lastnamedcs\expandafter\gobbleoneargument
+   \else
+     \expandafter\firstofoneargument
+   \fi}
+
+\def\xmlmappedvalue#1#2#3%
+  {\ifcsname\??xmlmapvalue#1:#2\endcsname
+     \expandafter\lastnamedcs
+   \else
+     \csname\??xmlmapvalue#1:#3\expandafter\endcsname
+   \fi}
+
+\let\xmldoifvalueelse\xmldoifelsevalue
+
+\let\xmlmapval\xmlmapvalue
+\let\xmlval   \xmlvalue
+
+%D Experimental:
+
+\def\xmlgetindex    #1{\clf_xmlgetindex {\xmldocument}{#1}}
+\def\xmlwithindex #1#2{\clf_xmlwithindex{\xmldocument}{#1}{#2}}
+\def\xmlreference #1#2{\string\xmlwithindex{#1}{#2}}
+
+%D Entities:
+%D
+%D \starttyping
+%D \xmlsetentity{tex}{\TEX{}} % {} needed
+%D \stoptyping
+
+\unexpanded\def\xmlsetentity#1#2{\clf_xmlsetentity{#1}{\detokenize{#2}}}
+\unexpanded\def\xmltexentity#1#2{\clf_xmltexentity{#1}{\detokenize{#2}}}
+
+%D The following might change (or even disappear) so we keep it undocumented.
+
+\setnewconstant\xmlautoentities\plusone % 0=off, 1=upper, 2=upper,lower
+
+\unexpanded\def\xmle
+  {\ifcase\xmlautoentities
+     \expandafter\lxml_e_none
+   \or
+     \expandafter\lxml_e_upper
+   \or
+     \expandafter\lxml_e_upperlower
+   \else
+     \expandafter\lxml_e_none
+   \fi}
+
+\def\lxml_e_none#1#2% safe
+  {#1}
+
+\def\lxml_e_upper#1#2% can be abbreviation
+  {\ifcsname#2\endcsname
+     \csname#2\expandafter\endcsname
+   \else
+     #1%
+   \fi}
+
+\def\lxml_e_upperlower#1#2% can be anything, so unsafe
+  {\ifcsname#2\endcsname
+     \csname#2\expandafter\endcsname
+   \else\ifcsname#1\endcsname
+     \csname#1\expandafter\expandafter\expandafter\endcsname
+   \else
+     #1%
+   \fi\fi}
+
+% \def\lxml_e_upper#1#2% can be abbreviation
+%   {\ifcsname\detokenize{#2}\endcsname
+%      \lastnamedcs
+%    \else
+%      \detokenize{#1}%
+%    \fi}
+
+% \def\lxml_e_upperlower#1#2% can be anything, so unsafe
+%   {\ifcsname\detokenize{#2}\endcsname
+%      \expandafter\lastnamedcs
+%    \else\ifcsname\detokenize{#1}\endcsname
+%      \doubleexpandafter\lastnamedcs
+%    \else
+%      \detokenize{#1}%
+%    \fi\fi}
+
+%D We keep these around as there are also MP, LUA and TEX variants but
+%D they are not the same as in \MKII.
+
+\unexpanded\def\processXMLbuffer
+  {\dosingleempty\lxml_process_buffer}
+
+\def\lxml_process_buffer[#1]%
+  {\xmlprocessbuffer{temp}{#1}{}}
+
+\unexpanded\def\processXMLfile#1%
+  {\xmlprocessfile{temp}{#1}{}}
+
+\unexpanded\def\XMLdata#1%
+  {\xmlprocessdata{temp}{#1}{}}
+
+\let\processxmlbuffer\processXMLbuffer
+\let\processxmlfile  \processXMLfile
+\let\xmldata         \XMLdata
+
+\unexpanded\def\xmlsetinjectors[#1]%
+  {\clf_xmlsetinjectors{#1}}
+
+\unexpanded\def\xmlresetinjectors
+  {\clf_xmlresetinjectors{}}
+
+% \def\xmlinjector#1{\executeifdefined{#1}\donothing}
+
+\def\xmlinjector#1{\fastsetup{xml:directive:injector:#1}}
+
+\startsetups xml:directive:injector:page
+    \page
+\stopsetups
+
+\startsetups xml:directive:injector:column
+    \column
+\stopsetups
+
+\startsetups xml:directive:injector:blank
+    \blank
+\stopsetups
+
+\startsetups xml:directive:injector:noline
+    \vskip-\lineheight
+\stopsetups
+
+\let\xmlapplyselectors\clf_xmlapplyselectors
+
+% \let\xmlcatcodes\notcatcodes
+
+\protect \endinput
+
+% \newcount\charactersactiveoffset \charactersactiveoffset="10000
+%
+% \startextendcatcodetable\ctxcatcodes
+%     \catcode\numexpr\charactersactiveoffset+`<\relax=13
+%     \catcode\numexpr\charactersactiveoffset+`&\relax=13
+%     \catcode\numexpr\charactersactiveoffset+`>\relax=13
+% \stopextendcatcodetable
+%
+% \startextendcatcodetable\xmlcatcodes % not needed
+%     \catcode\numexpr\charactersactiveoffset+`<\relax=13
+%     \catcode\numexpr\charactersactiveoffset+`&\relax=13
+%     \catcode\numexpr\charactersactiveoffset+`>\relax=13
+% \stopextendcatcodetable
+%
+% \ctxlua { % entities are remembered in the format
+%     commands.remapentity("<",characters.activeoffset + utf.byte("<"))
+%     commands.remapentity("&",characters.activeoffset + utf.byte("&"))
+%     commands.remapentity(">",characters.activeoffset + utf.byte(">"))
+% }