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-%% xr-hyper package (beta release)
-
-%% Copyright (C) 1993-2023 David Carlisle
-
-%% This is a modified version of the xr package from the Standard LaTeX
-%% tools distribution. It has some internal changes to cooperate with
-%% the hyperref package, and one new user level argument, also mainly of
-%% use for hyperref.
-%% If no problems are reported the version in the tools distribution
-%% will be updated to match this at the next LaTeX release.
-
-%% \externaldocument[prefix][nocite]{document}[URL]
-
-%% The `document' referred to by the main argument is the file
-%% document.aux
-%% which must be somewhere on TeX's input path.
-%% Some packages (eg hyperref) really need to know the location of the
-%% final document rather than the aux file. By default this is assumed
-%% to be `document.pdf'. A package may redefine the command \XR@ext to
-%% change this default extension. However sometimes the final
-%% document may be in a position unrelated to the aux file, or the
-%% browser may not be able to find files at an arbitrary point in
-%% TeX's input path, so the new final optional argument allows a full
-%% URL to the final document to be specified.
-%%
-%% \externaldocument{file}[http://here.xxx.edu/this/path/to/file.pdf]
-%%
-%% Version beta2 also added another improvement unrelated
-%% to the hyperref support. Olivier Michel pointed out that
-%% if the aux file was not on texinputs you could not always go
-%% \externaldocument{/some/path/to/file}
-%% specifically that worked if file.aux was a `simple' document with
-%% one aux file, but if \include had been used, the `sub' aux files
-%% would not be found by xr in the remote directory.
-%% This version calls \filename@parse to get the directory name of the
-%% remote directory, which is then explicitly prepended to the names of
-%% any included aux files.
-%%
-%%
-%% Version 6.1 incorporates linking to citations in external documents
-%% (originally from xcite package and now included in xr.
-%%
-%% Many packages have variant citation commands (natbib,
-%% biblatex,....) and the external document may or may not have used
-%% hyperref. Because of these differences the citation linking may not
-%% always work, it can be disabled by specifying [nocite] after the
-%% prefix:
-%%
-%% \externaldocument[][nocite]{somefile}
-%%
-%% In the case of \ref, if the external document has not used
-%% hyperref, this package will work like xr and produce the correct
-%% text, but it can only produce a file link and
-%% not target the exact location as the target document has no destinations
-%% In this case you may prefer to use \ref* rather than
-%% \ref to avoid generating a hyperlink.
-%%
-%%
-\NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{xr-hyper}
- [2023-11-26 v7.01g eXternal References (DPC)]
-
-\def\externaldocument{\@testopt\XR@cite{}}
-\let\externalcitedocument\externaldocument
-\def\XR@cite[#1]{\@testopt{\XR@[#1]}{}}
-\def\XR@[#1][#2]#3{\@testopt{\XR@@{#1}{#2}{#3}}{#3.\XR@ext}}
-
-\def\XR@@#1#2#3[#4]{{%
- \makeatletter
- \def\XR@prefix{#1}%
- \def\XR@nocite{#2}%
- \ifx\XR@nocite\XR@@nocite
- \let\XR@bibcite\vadjust
- \else
- \let\XR@bibcite\bibcite
- \fi
- \def\XR@URL{#4}%
- \filename@parse{#3}%
- \XR@next#3.aux\relax\\}}
-\def\XR@@nocite{nocite}
-\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}
-
-\long\def\@gobblethree #1#2#3{}
-\long\def\@firstofthree #1#2#3{#1}
-\long\def\@secondofthree#1#2#3{#2}
-\long\def\@thirdofthree #1#2#3{#3}
-
-% 2023-05-13 we need to handle \newlabel's with two arguments differently
-% to \newlabel's with five argument. For this we make use of
-% XR@addURL:
-\def\XR@addURL#1{\XR@@dURL#1{}{}{}{}\\}
-\def\XR@@dURL#1#2#3#4#5\\{%
- {#1}{#2}{#3}{#4}{\XR@URL}%
- }%
-
-\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}%
- \let\XR@testnewlabel\XR@testnewlabel@aux
- \expandafter\XR@read\fi}
-\def\XR@read{%
- \read\@inputcheck to\XR@line
- \expandafter\XR@test\XR@line...\XR@}
-% 2019 update to match xr
-\long\def\XR@test#1#2#3#4\XR@{%
- \let\XR@tempa\@gobblethree
- \ifx#1\newlabel
- \let\XR@tempa\@firstofthree
- \else\ifx#1\XR@bibcite
- \let\XR@tempa\@secondofthree
- \else\ifx#1\@input
- \let\XR@tempa\@thirdofthree
- \fi\fi\fi
- \XR@tempa
- {%
- \expandafter\protected@xdef\csname r@\XR@prefix#2\endcsname{\XR@addURL{#3}}%
- }%
- {\expandafter\bibcite\expandafter{\XR@prefix#2}{#3}}%
- {\edef\XR@list{\XR@list\filename@area#2\relax}}%
- \ifeof\@inputcheck\expandafter\XR@aux
- \else\expandafter\XR@read\fi}
-
-
-\providecommand\XR@ext{pdf}
-
-\endinput
-%%
-%% End of file `xr-hyper.sty'.
-
-
-%% History
-%%
-%% 1997/10/06 v6.00 beta2
-%%
-%% 1999/09/01 v6.00 beta3
-%% Definitions of \XR@addURL corrected (Heiko Oberdiek).
-%%
-%% 2000/03/22 v6.00 beta4
-%% \xdef changed to \protected@xdef.
-%%
-%% 2019/10/03 v6.1
-%% Incorporate updates to xr (including citation support)
-%%
-%% 2020-05-14 v7.00e
-%% add additional braces to \r@ only if hyperref is not detected in the aux
-%% of the source document (https://github.com/latex3/hyperref/issues/118)
-%%
-%% 2023-05-15 v.7.00z
-%% unified and simplified the brace handling: all defined references have now
-%% five brace groups. Together with the planed change in LaTeX 2023-06-01 this
-%% will improve the combination of hyperref/non-hyperref documents.
-%%
-%% 2023-11-26
-%%
-%% Always store the URL/file name of the external document to allow file links
-%% even if it has no destinations.
-%%