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+%%
+%% This is an old release of `xr.sty' used during rollback operations.
+%% Do not use this file directly.
+%% ==============================
+%%
+%% This is file `xr.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% xr.dtx (with options: `package')
+%%
+%% This is a generated file.
+%%
+%% The source is maintained by the LaTeX Project team and bug
+%% reports for it can be opened at https://latex-project.org/bugs/
+%% (but please observe conditions on bug reports sent to that address!)
+%%
+%%
+%% Copyright (C) 1993-2023
+%% The LaTeX Project and any individual authors listed elsewhere
+%% in this file.
+%%
+%% This file was generated from file(s) of the Standard LaTeX `Tools Bundle'.
+%% --------------------------------------------------------------------------
+%%
+%% It may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3c
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%% https://www.latex-project.org/lppl.txt
+%% and version 1.3c or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This file may only be distributed together with a copy of the LaTeX
+%% `Tools Bundle'. You may however distribute the LaTeX `Tools Bundle'
+%% without such generated files.
+%%
+%% The list of all files belonging to the LaTeX `Tools Bundle' is
+%% given in the file `manifest.txt'.
+%%
+%% File: xr.dtx Copyright (C) 1993-2019 David Carlisle
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{xr}
+ [2023-07-04 v5.06 eXternal References (DPC)]
+\def\externaldocument{\@ifnextchar[\XR@{\XR@[]}}
+\let\externalcitedocument\externaldocument
+\def\XR@[#1]#2{{%
+ \makeatletter
+ \def\XR@prefix{#1}%
+ \set@curr@file{#2}%
+ \expandafter\XR@next\@curr@file.aux\relax\\}}
+\def\XR@next#1\relax#2\\{%
+ \edef\XR@list{#2}%
+ \XR@loop{#1}}
+\def\XR@aux{%
+ \ifx\XR@list\@empty\else\expandafter\XR@explist\fi}
+
+\def\XR@explist{\expandafter\XR@next\XR@list\\}
+\def\XR@loop#1{\openin\@inputcheck{#1}\relax
+ \ifeof\@inputcheck
+ \PackageWarning{xr}{^^JNo file #1^^JLABELS NOT IMPORTED.^^J}%
+ \expandafter\XR@aux
+ \else
+ \PackageInfo{xr}{IMPORTING LABELS FROM #1}%
+ \expandafter\XR@read\fi}
+\def\XR@read{%
+ \read\@inputcheck to\XR@line
+ \expandafter\XR@test\XR@line...\XR@}
+\long\def\XR@test#1#2#3#4\XR@{%
+ \let\XR@tempa\@gobbletwo
+ \ifx#1\newlabel
+ \let\XR@tempa\@firstoftwo
+ \else\ifx#1\bibcite
+ \let\XR@tempa\@firstoftwo
+ \else\ifx#1\@input
+ \let\XR@tempa\@secondoftwo
+ \fi\fi\fi
+ \XR@tempa{#1{\XR@prefix#2}{#3}}{\edef\XR@list{\XR@list#2\relax}}%
+ \ifeof\@inputcheck\expandafter\XR@aux
+ \else\expandafter\XR@read\fi}
+\endinput
+%%
+%% End of file `xr.sty'.