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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.