CTAN has a new package: ifxetex

[CTAN Announcements]

A new package has been installed at tug.ctan.org and should soon be at your
favorite mirror.

Thank you,
Jim Hefferon
St Michael's College

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The following information was provided by the package's contributor.

Name of contribution: ifxetex
Author's name: Will Robertson
Location on CTAN: /macros/xetex/latex/ifxetex
Summary description: Provides the \ifxetex conditional
License type: lppl

Announcement text given by the package's contributor:
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Provides an analogue to ifpdf for XeTeX; this package works for either LaTeX 
or Plain using eTeX extensions.
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See this package at 
  http://tug.ctan.org/tex-archive/macros/xetex/latex/ifxetex
.  You may get a better network connection by using a CTAN mirror
near to you; see http://tug.ctan.org/tex-archive/README.mirrors .  
Our service is supported by the TeX Users Group http://www.tug.org .  
Please join a users group; see http://www.tug.org/usergroups.html .