pkgsrc/lang/cu-prolog/DESCR

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cu-Prolog is an experimental constraint logic programming language.
Unlike most conventional CLP systems, cu-Prolog allows user-defined
predicates as constraints and is suitable for implementing a natural
language processing system based on the unification-based
grammar. As an application of cu-Prolog, we developed
a JPSG (Japanese Phrase Structure Grammar) parser
with the JPSG Working Group (the chairman is Prof. GUNJI, Takao of
Osaka University) at ICOT.
cu-Prolog is also the complete implementation of the constraint
unification and its name (cu) comes from the technique.