Paper: Parsing With Logical Variables

ACL ID A83-1010
Title Parsing With Logical Variables
Venue Applied Natural Language Processing Conference
Session Main Conference
Year 1983

Logic based programming systems have enjoyed an increasing popularity in applied AI work in the last few years. One of the contributions to Computational Linguistics made by the Logic Programming Paradigm has been the Definite Clause Grammar. In comparing DCG's wlth previous parsing mechanisms such as ATN's, certain clear advantages are seen. We feel that the most important of these advantages are due to the use of Logical Variables with Unification as the fundamental operation on them. To illustrate the power of the Logical Variable, we have implemented an experimental ATN system which treats ATN registers as Logical Variables and provides a unification operation over them. We would llke to simultaneously encourage the use of the powerful mechanisms available in DCG's, and demonstrate tha...