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8.102. File::Spec
Performs common operations on file
specifications in a portable way. To do this, it automatically loads
the appropriate operating system-specific module, which is one of
File::Spec::Mac, File::Spec::OS2, File::Spec::Unix, File::Spec::VMS,
or File::Spec::Win32. The complete reference of available functions
is given in File::Spec::Unix; the functions are inherited by the
other modules and overridden as necessary. Subroutines should be
called as class methods, rather than directly.
