QPATR and Constraint Threading

Abstract

QPATR is an MS-DOS Arity/PROLOG implementation of the PATR-II formalism for unification grammar. The fbnnalism has been extended to include the constraints of LFG as well as negation and disjunction, which are implemented with the disjunction and negation-as-failure of PROLOG itself. A technique of constraint threading is employed to collect negative and… (More)

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