YAP Prolog

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YAP Prolog
Latest release 5.1.1 / 2006.04.18
Preview release 5.1.2 / 2007.06.29
OS Linux, Windows, Solaris, Mac OS X
Platform Programming language
License Perl Artistic License
Website [1]

YAP is an open source, high-performance implementation of the Prolog programming language developed at LIACC/Universidade do Porto and at COPPE Sistemas/UFRJ. Its Prolog engine is based in the WAM (Warren Abstract Machine), with several optimizations for better performance. YAP follows the Edinburgh tradition, and is largely compatible with the ISO-Prolog standard and with Quintus and SICStus Prolog. YAP has been developed since 1985. The original version was written in assembly, C and Prolog, and achieved high performance on m68k-based machines.

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