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%D \module
%D [ file=attr-neg,
%D version=2007.06.06,
%D title=\CONTEXT\ Attribute Macros,
%D subtitle=Negation,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=PRAGMA-ADE]
%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 Attribute Macros / Negation}
\registerctxluafile{attr-neg}{1.001}
\unprotect
\def\registernegative#1#2%
{\setevalue{(ns:#1)}{\attribute\negativeattribute\ctxlua{tex.write(attributes.negatives.register('#2'))}\relax}}
\def\dotriggernegative
{\ctxlua{attributes.negatives.enable()}%
\gdef\dotriggernegative##1{\csname(ns:##1)\endcsname}%
\dotriggernegative}
\registernegative{positive}{positive}
\registernegative{negative}{negative}
\unexpanded\def\startnegative{\dotriggernegative\v!negative}
\unexpanded\def\stopnegative {\dotriggernegative\v!positive}
\unexpanded\def\startpositive{\dotriggernegative\v!positive}
\unexpanded\def\stoppositive {\dotriggernegative\v!negative}
\protect \endinput
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