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==History==
Constraint logic programming was introduced by Jaffar and Lassez in 1987.<ref>Jaffar, Joxan, and J-L. Lassez. "[https://dl.acm.org/citation.cfm?id=41635 Constraint logic programming]." Proceedings of the 14th ACM SIGACT-SIGPLAN symposium on Principles of programming languages. ACM, 1987.</ref> They generalized the observation that the term equations and disequations of [[Prolog II]] were a specific form of constraints, and generalized this idea to arbitrary constraint languages. The first implementations of this concept were [[Prolog III]], [[CLP(R)]], and [[CHIP (programming language)|CHIP]].{{citation needed}}
==See also==
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