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+------------------------
+THE IFXETEX PACKAGE v0.6
+
+This very simple package, for both Plain TeX and LaTeX,
+defines the \ifxetex boolean for testing whether XeTeX
+is being used for typesetting.
+
+Also provides the \RequireXeTeX command which throws
+an error if XeTeX is not the engine in use.
+
+To extract the package from the source file "ifxetex.tex",
+execute `latex ifxetex.ins`. Executing `xelatex ifxetex.tex`
+compiles the documentation and generates this README.
+
+-------------------
+Will Robertson
+Copyright 2006-2010