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%D \module
%D   [       file=m-compatibility,
%D        version=2018.02.21,
%D          title=\CONTEXT\ System Macros,
%D       subtitle=ConTeXt Compatibility Layer,
%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.

\ifcase\contextlmtxmode\else\endinput\fi

%D I fear that I will not keep up in this file so feel free to contribute to the
%D following. The idea is nto to load this file but more to have some insight in
%D how to control compatibility (to some extent).

\writestatus{loading}{ConTeXt Compatibility Layer}

%D The side float mechanism has been redone and is not space compatible. Hopefully
%D it will become stable soon and after that we will not touch it unless we have a
%D real bug. There might be more control options. The problem is that there are too
%D many combinations of content before and after a side float possible.

\ifnum\contextversionno<20180101\relax
    % nothing here
\fi

%D Picking up the right last line depth is sort of tricky when we cross a page and
%D have some left|-|over material. The sychronizer is normally not needed but for
%D now turned on by default.

\ifnum\contextversionno<20180221\relax
    \disabledirectives[vspacing.synchronizepage]
\fi

%D Some day we might default to the following which is a bit more conistent but
%D not compatible.

% \setdisplaymathspacemodel[4]
%
% \ifnum\contextversionno<20180221\relax
%     \setdisplaymathspacemodel[3]
% \fi

%D Currently this is in \type {cont-loc.mkiv} but some day we might do:

% \definemixedcolumns
%   [\v!columns]
%   % compatible with columns default :
%   [\c!balance=\v!yes,
%    \c!blank={\v!line,\v!fixed}]
%
% \unexpanded\def\setupcolumns
%   {\setupmixedcolumns[\v!columns]}

%D as well as:

% \input page-cst.mkiv

\endinput