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diff --git a/tex/context/modules/mkii/x-res-12.mkii b/tex/context/modules/mkii/x-res-12.mkii
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+%D \module
+%D   [      file=x-fig-12,
+%D        version=2005.05.05,
+%D          title=\CONTEXT\ Style File,
+%D       subtitle=Resource 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.
+
+%D This module implements the dimension checking using \RLXTOOLS.
+
+\unprotect
+
+\chardef\figurerlxmode\plusone   % rlx permitted
+
+\startXMLmapping[rli]
+  \defineXMLprocess[rl:identify]
+  \defineXMLsavecontent[rl:width] {\!!zeropoint}
+  \defineXMLsavecontent[rl:height]{\!!zeropoint}
+\stopXMLmapping
+
+\def\doanalyzefiguredimensionsrlx
+  {\ifcase\figurestatus \ifcase\figurerlxmode \else
+     \doifnotfile{\wantedfigurefullname.rli}
+       {% let's try runtime running first
+        \doshowfiguremessage6\wantedfigurefullname
+        \executesystemcommand{texmfstart rlxtools --identify \wantedfigurefullname}}%
+     \doifnotfile{\wantedfigurefullname.rli}
+       {% we assume that runtime running failed
+        \doshowfiguremessage6\wantedfigurefullname
+        \installprogram{texmfstart rlxtools --identify \wantedfigurefullname}}%
+        \doiffile{\wantedfigurefullname.rli}
+          {\global\let\analyzedfigurewidth \!!zeropoint
+           \global\let\analyzedfigureheight\!!zeropoint
+           \startnointerference % groups
+           \startXMLmapping[rli]%
+           \startXMLignore
+           \processXMLfile{\wantedfigurefullname.rli}%
+           \xdef\analyzedfigurewidth {\the\dimexpr\XMLflush{rl:width} \relax}% turn whatever into pt
+           \xdef\analyzedfigureheight{\the\dimexpr\XMLflush{rl:height}\relax}% turn whatever into pt
+           \stopXMLignore
+           \stopXMLmapping
+           \stopnointerference
+           \setanalyzedfiguredimensions\!!twelve}%
+   \fi\fi}
+
+\let\doanalyzefiguredimensionsexternal\doanalyzefiguredimensionsrlx
+
+\protect \endinput