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%D \module
%D [ file=core-dat,
%D version=2021.04.17, % replaces core-two from 1997.03.31,
%D title=\CONTEXT\ Core Macros,
%D subtitle=Multipass Datasets,
%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 Core Macros / Multipass Datasets}
%D \starttyping
%D \definedataset[test-1]
%D \definedataset[test-2][delay=yes]
%D
%D \startlines
%D set 1: \setdataset[test-1][whatever=this-or-that-1]
%D set 2: \setdataset[test-2][whatever=this-or-that-2]
%D set 3: \setdataset[test-2][whatever=this-or-that-3]
%D \stoplines
%D
%D \startlines
%D get 1: \datasetvariable{test-1}{1}{whatever} / \datasetvariable{test-1}{1}{realpage}
%D get 2: \datasetvariable{test-2}{1}{whatever} / \datasetvariable{test-2}{1}{realpage}
%D get 3: \datasetvariable{test-2}{2}{whatever} / \datasetvariable{test-2}{2}{realpage}
%D \stoplines
%D \stoptyping
%D \starttyping
%D \definedataset[nofpages]
%D
%D \dorecurse{16}{whatever\page}
%D
%D \setdataset [nofpages] [pagetotal=\lastpagenumber]
%D
%D \testfeatureonce{100}{test \datasetvariable[todo-datasets]{nofpages}{1}{pagetotal} }
%D \stoptyping
\unprotect
\registerctxluafile{core-dat}{autosuffix}
\installcorenamespace{dataset}
\installcommandhandler \??dataset {dataset} \??dataset
\permanent\tolerant\protected\def\setdataset[#1]#*[#2]#*[#3]%
{\begingroup
\cdef\currentdataset{#1}%
\ifparameters\or\or
\clf_setdataset
name {\currentdataset}%
delay {\datasetparameter\c!delay}%
data {#2}%
\relax
\or
\cdef\currentdataset{#1}%
\clf_setdataset
name {\currentdataset}%
tag {#2}%
delay {\datasetparameter\c!delay}%
data {#3}%
\relax
\fi
\endgroup}
% \permanent\def\datasetvariable#1#2#3%
% {\clf_datasetvariable{#1}{#2}{#3}}
\permanent\tolerant\def\datasetvariable[#1]%
{\ifparameter#1\or
\expandafter\clf_datasetvariablefromjob{#1\expandafter}%
\else
\expandafter\clf_datasetvariable
\fi}
\protect
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