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Delaying has become a mechanism common to logic, functional logic,
constraint logic, and concurrent logic programming languages. It
relaxes the strict left-to-right computation rule adopted in Prolog
and enables the execution of some predicate calls to be delayed until
some variables in them are instantiated. B-Prolog provides the user
with a powerful construct, called delay clauses, for specifying
delaying.
Subsections
Neng-Fa Zhou
1999-11-24