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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.

See also

• Comparison of Prolog implementations
• Prolog syntax and semantics

External links

• YAP Prolog website

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