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|File Name Extensions
consideration is what extension to use for the source files. Tradition
.pl, but conflicts with Perl force the use of
another extension on systems where extensions have global meaning, such
as MS-Windows. On such systems
.pro is the common
alternative. On MS-Windows, the alternative extension is stored in the
versions of SWI-Prolog load files with the extension
well as with the registered alternative extension without explicitly
specifying the extension. For portability reasons we propose the
.pro and use this extension for the files you want
to load through your file manager. Use
.pl for all other files for maximal portability.