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CHIP (Constraint Handling in Prolog) is a constraint logic programming language developed by M. Dincbas, Pascal Van Hentenryck and colleagues in 1985 at the European Computer-Industry Research Centre (ECRC), initially using a Prolog language interface. [1] It was the first programming language to implement constraint programming over finite domains, [2] [3] and subsequently to introduce the concept of global constraints. [4]
CHIP V5 is the version developed and marketed by COSYTEC in Paris since 1993 with Prolog, using C, C++, or Prolog language interfaces. [5] The commercially successful ILOG CPLEX solver is also, partly, an offshoot of the ECRC version of CHIP.