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diff --git a/tex/context/base/typo-bld.mkiv b/tex/context/base/typo-bld.mkiv
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+%D \module
+%D   [       file=typo-bld, % was node-par,
+%D        version=2008.09.30,
+%D          title=\CONTEXT\ Typesetting Macros,
+%D       subtitle=Paragraph Building,
+%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 Macros / Paragraph Building}
+
+%D This is very experimental, undocumented, subjected to changes, etc. just as
+%D the underlying interfaces. But at least it's cleaned as part of the status-mkiv
+%D cleanup.
+
+% \startparbuilder[default]
+%     \input tufte \par
+%     \startparbuilder[oneline]
+%         \input tufte \par
+%     \stopparbuilder
+%     \input tufte \par
+% \stopparbuilder
+%
+% \startparbuilder[oneline]
+%     \dorecurse{100}{\input ward \par}
+% \stopparbuilder
+
+\unprotect
+
+\registerctxluafile{typo-bld}{1.001}
+
+\definesystemattribute[parbuilder][public]
+
+\installcorenamespace {parbuilder}
+
+\unexpanded\def\defineparbuilder[#1]%
+  {\ctxcommand{defineparbuilder("#1")}}
+
+\unexpanded\def\startparbuilder[#1]%
+  {\ifhmode\par\fi
+   \ctxcommand{startparbuilder("#1")}}
+
+\unexpanded\def\stopparbuilder
+  {\ifhmode\par\fi
+   \ctxcommand{stopparbuilder()}}
+
+\unexpanded\def\setmainparbuilder[#1]%
+  {\ctxcommand{setparbuilder("#1")}}
+
+% no high level interface, after all implementing a linebreaker is not something that
+% the average user will do
+
+\defineparbuilder[default] % just for testing
+\defineparbuilder[oneline] % just for testing
+\defineparbuilder[basic]   % just for testing
+
+\def\enableparbuilders {\ctxcommand{enableparbuilder()}}  % hooks in otr so we need to pickup
+\def\disableparbuilders{\ctxcommand{disableparbuilder()}} % hooks in otr so we need to pickup
+
+\protect \endinput