YAP (Prolog)

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YAP Prolog
Stable release 6.2.2 / 28 October 2010; 3 years ago (2010-10-28)
Operating system Linux, Windows, Solaris, Mac OS X
Platform Programming language
License Perl Artistic License 2.0
Website http://www.dcc.fc.up.pt/~vsc/Yap/

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 Prolog 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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