A Booleanrelation, often an equality or ineqality relation, between the values of one or more mathematical variables (often two).E.g. x>3 is a constraint on x.constraint satisfaction attempts to assign values to variables so that all constraints are true.Usenet newsgroup: news:comp.constraints.{FAQ (http://www.cs.unh.edu/ccc/archive/)}.(2002-06-08)