# Constraint logic programming

Constraint logic programming is a form of constraint programming, in which logic programming is extended to include concepts from constraint satisfaction. A constraint logic program is a logic program that contains constraints in the body of clauses. An example of a clause including a constraint is A(X,Y) :- X+Y>0, B(X), C(Y). In this clause, X+Y>0 is a constraint; A(X,Y), B(X), and C(Y) are literals as in regular logic programming. This clause states one condition under which the statement A(X,Y) holds: X+Y is greater than zero and both B(X) and C(Y) are true. As in regular logic programming, programs are queried about the provability of a goal, which may contain constraints in addition to literals. A proof for a goal is composed of clauses whose bodies are satisfiable constraints and literals that can in turn be proved using other clauses.

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is treated in Constraint Programming

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University lecture presentations. Charles University, Prague.

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is applicable to CLP Problems (with solutions)

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Many CSP problems along with description and solutions in multiple languages.

is applicable to Exploring Life through Logic Programming: Logic Programming in Bioinformatics

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This chapter provides a broad overview of how logic programming, and in particular Answer Set Program...

is treated in CLP(FD) Constraint Logic Programming over Finite Domains

This tutorial is for reasonably experienced SWI-Prolog programmers who want to use clp(fd). Additi...