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diff --git a/Master/texmf-dist/tex/latex/oberdiek/zref-xr.sty b/Master/texmf-dist/tex/latex/oberdiek/zref-xr.sty
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+%%
+%% This is file `zref-xr.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% zref.dtx  (with options: `xr')
+%% 
+%% This is a generated file.
+%% 
+%% Copyright (C) 2006 by Heiko Oberdiek <oberdiek@uni-freiburg.de>
+%% 
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either
+%% version 1.3 of this license or (at your option) any later
+%% version. The latest version of this license is in
+%%    http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of
+%% LaTeX version 2005/12/01 or later.
+%% 
+%% This work has the LPPL maintenance status "maintained".
+%% 
+%% This Current Maintainer of this work is Heiko Oberdiek.
+%% 
+%% This work consists of the main source file zref.dtx
+%% and the derived files
+%%    zref.sty, zref.pdf, zref.ins, zref.drv,
+%%    zref-base.sty, zref-abspage.sty, zref-counter.sty,
+%%    zref-dotfill.sty, zref-hyperref.sty, zref-lastpage.sty,
+%%    zref-perpage.sty, zref-savepos.sty, zref-titleref.sty,
+%%    zref-totpages.sty, zref-user.sty, zref-xr.sty,
+%%    zref-example.tex.
+%% 
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{zref-xr}%
+  [2006/05/25 v1.2 Module xr for zref (HO)]
+\RequirePackage{zref-base}[2006/05/25]
+\@ifundefined{ZREF@baseok}{\endinput}{}
+\RequirePackage{keyval}
+\zref@newprop{url}{}%
+\providecommand*{\zref@xr@ext}{%
+  \@ifundefined{XR@ext}{pdf}{\XR@ext}%
+}%
+\newif\ifZREF@xr@zreflabel
+\newcommand*{\zexternaldocument}{%
+  \begingroup
+    \csname @safe@actives@true\endcsname
+    \makeatletter
+    \@ifstar{%
+      \ZREF@xr@zreflabelfalse
+      \@testopt\ZREF@xr@externaldocument{}%
+    }{%
+      \ZREF@xr@zreflabeltrue
+      \@testopt\ZREF@xr@externaldocument{}%
+    }%
+}%
+\def\ZREF@xr@externaldocument[#1]#2{%
+    \def\ZREF@xr@prefix{#1}%
+    \let\ZREF@xr@filelist\@empty
+    \edef\ZREF@xr@file{#2.aux}%
+    \filename@parse{#2}%
+    \@testopt\ZREF@xr@graburl{#2.\zref@xr@ext}%
+}%
+\def\ZREF@xr@graburl[#1]{%
+    \edef\ZREF@xr@url{#1}%
+    \ZREF@xr@checkfile
+  \endgroup
+}%
+\def\ZREF@xr@checkfile{%
+  \openin\@inputcheck\ZREF@xr@file\relax
+  \ifeof\@inputcheck
+    \PackageWarning{zref/xr}{%
+      File `\ZREF@xr@file' not found or empty,\MessageBreak
+      labels not imported%
+    }%
+  \else
+    \PackageInfo{zref/xr}{%
+      Label \ifZREF@xr@zreflabel (zref) \fi import from `\ZREF@xr@file'%
+    }%
+    \def\ZREF@xr@found{0}%
+    \def\ZREF@xr@ignored{0}%
+    \ZREF@xr@processfile
+    \closein\@inputcheck
+    \begingroup
+      \let\on@line\@empty
+      \PackageInfo{zref/xr}{%
+        Statistics for `\ZREF@xr@file':
+        \ZREF@xr@found\space found, %
+        \ZREF@xr@ignored\space ignored%
+      }%
+    \endgroup
+  \fi
+  \ifx\ZREF@xr@filelist\@empty
+  \else
+    \edef\ZREF@xr@file{\expandafter\@car\ZREF@xr@filelist\@nil}%
+    \edef\ZREF@xr@filelist{\expandafter\@cdr\ZREF@xr@filelist\@nil}%
+    \expandafter\ZREF@xr@checkfile
+  \fi
+}%
+\def\ZREF@xr@processfile{%
+  \read\@inputcheck to\ZREF@xr@line
+  \expandafter\ZREF@xr@processline\ZREF@xr@line..\ZREF@nil
+  \ifeof\@inputcheck
+  \else
+    \expandafter\ZREF@xr@procesfile
+  \fi
+}%
+\long\def\ZREF@xr@processline#1#2#3\ZREF@nil{%
+  \def\x{#1}%
+  \toks@{#2}%
+  \ifZREF@xr@zreflabel
+    \ifx\x\ZREF@xr@zref@newlabel
+      \expandafter\ZREF@xr@process@zreflabel\ZREF@xr@line...\ZREF@nil
+    \fi
+  \else
+    \ifx\x\ZREF@xr@newlabel
+      \expandafter\ZREF@xr@process@label\ZREF@xr@line...[]\ZREF@nil
+    \fi
+  \fi
+  \ifx\x\ZREF@xr@@input
+    \edef\ZREF@xr@filelist{%
+      \unexpanded\expandafter{\ZREF@xr@filelist}%
+      {\filename@area\the\toks@}%
+    }%
+  \fi
+  \ifeof\@inputcheck
+  \else
+    \expandafter\ZREF@xr@processfile
+  \fi
+}%
+\def\ZREF@xr@process@zreflabel\zref@newlabel#1#2#3\ZREF@nil{%
+  \def\ZREF@xr@refname{Z@R@\ZREF@xr@prefix#1}%
+  \edef\ZREF@xr@found{\the\numexpr\ZREF@xr@found+1\relax}%
+  \def\x{#2}%
+  \@ifundefined{\ZREF@xr@refname}{%
+    \let\ZREF@xr@list\x
+    \ifx\ZREF@xr@list\@empty
+      \PackageWarningNoLine{zref/xr}{%
+        Label `#1' without properties ignored\MessageBreak
+        in file `\ZREF@xr@file'%
+      }%
+      \edef\ZREF@xr@ignored{\the\numexpr\ZREF@xr@ignored+1\relax}%
+    \else
+      \expandafter\ZREF@xr@checklist\x\ZREF@nil
+      \expandafter\global\expandafter\let
+          \csname \ZREF@xr@refname\endcsname\x
+    \fi
+    \ZREF@xr@urlcheck{\ZREF@xr@prefix#1}%
+  }{%
+    \ZREF@xr@ignorewarning{\ZREF@xr@prefix#1}%
+  }%
+}%
+\def\ZREF@xr@process@label\newlabel#1#2#3[#4]#5\ZREF@nil{%
+  \def\ZREF@xr@refname{Z@R@\ZREF@xr@prefix#1}%
+  \edef\ZREF@xr@found{\the\numexpr\ZREF@xr@found+1\relax}%
+  \def\x{#2}%
+  \@ifundefined{\ZREF@xr@refname}{%
+    \expandafter\ZREF@xr@scanparams
+        \csname\ZREF@xr@refname\expandafter\endcsname
+        \x{}{}{}{}{}\ZREF@nil
+    \ifx\\#4\\%
+    \else
+      % ntheorem knows an optional argument at the end of \newlabel
+      \zref@ifpropundefined{theotype}{%
+        \zref@newprop{theotype}{}%
+      }{}%
+      \expandafter\g@addto@macro
+          \csname\ZREF@xr@refname\endcsname{\theotype{#4}}%
+    \fi
+    \ZREF@xr@urlcheck{\ZREF@xr@prefix#1}%
+  }{%
+    \ZREF@xr@ignorewarning{\ZREF@xr@prefix#1}%
+  }%
+}
+\def\ZREF@xr@zref@newlabel{\zref@newlabel}%
+\def\ZREF@xr@newlabel{\newlabel}%
+\def\ZREF@xr@@input{\@input}%
+\def\ZREF@xr@ignorewarning#1{%
+  \PackageWarningNoLine{zref/xr}{%
+    Label `#1' is already in use\MessageBreak
+    in file `\ZREF@xr@file'%
+  }%
+  \edef\ZREF@xr@ignored{\the\numexpr\ZREF@xr@ignored+1\relax}%
+}%
+\def\ZREF@xr@checklist#1#2#3\ZREF@nil{%
+  \ifx\@undefined#1\relax
+    \expandafter\ZREF@xr@checkkey\string#1\@nil
+  \fi
+  \ifx\\#3\\%
+  \else
+    \@ReturnAfterFi{%
+      \ZREF@xr@checklist#3\ZREF@nil
+    }%
+  \fi
+}%
+\long\def\@ReturnAfterFi#1\fi{\fi#1}%
+\def\ZREF@xr@checkkey#1#2\@nil{%
+  \zref@ifpropundefined{#2}{%
+    \zref@newprop{#2}{}%
+  }{}%
+}%
+\def\ZREF@xr@scanparams#1#2#3#4#5#6#7\ZREF@nil{%
+  \global\let#1\@empty
+  \ZREF@foundfalse
+  \ZREF@xr@scantitleref#1#2\TR@TitleReference{}{}\ZREF@nil
+  \ifZREF@found
+  \else
+    \g@addto@macro#1{\default{#2}}%
+  \fi
+  % page
+  \g@addto@macro#1{\page{#3}}%
+  % nameref title
+  \ifZREF@found
+  \else
+    \ifx\\#4\\%
+    \else
+      \zref@ifpropundefined{title}{%
+        \zref@newprop{title}{}%
+      }{}%
+      \g@addto@macro#1{\title{#4}}%
+    \fi
+  \fi
+  % anchor
+  \ifx\\#5\\%
+  \else
+    \zref@ifpropundefined{anchor}{%
+      \zref@newprop{anchor}{}%
+    }{}%
+    \g@addto@macro#1{\anchor{#5}}%
+  \fi
+  \ifx\\#6\\%
+  \else
+    \zref@ifpropundefined{url}{%
+      \zref@newprop{url}{}%
+    }{}%
+    \g@addto@macro#1{\url{#6}}%
+  \fi
+}%
+\def\ZREF@xr@scantitleref#1#2\TR@TitleReference#3#4#5\ZREF@nil{%
+  \ifx\\#5\\%
+  \else
+    \g@addto@macro#1{%
+      \default{#3}%
+      \title{#4}%
+    }%
+    \ZREF@foundtrue
+  \fi
+}%
+\def\ZREF@xr@urlcheck#1{%
+  \zref@ifrefcontainsprop{#1}{anchor}{%
+    \zref@ifrefcontainsprop{#1}{url}{%
+    }{%
+      \expandafter\g@addto@macro\csname Z@R@#1\expandafter\endcsname
+      \expandafter{%
+        \expandafter\url\expandafter{\ZREF@xr@url}%
+      }%
+    }%
+  }{%
+  }%
+}%
+\define@key{ZREF@XR}{ext}{%
+  \def\zref@xr@ext{#1}%
+}%
+\newcommand*{\zxrsetup}{%
+  \setkeys{ZREF@XR}%
+}%
+\endinput
+%%
+%% End of file `zref-xr.sty'.