Paper: Expressing Generalizations In Unification-Based Grammar Formalisms

ACL ID E89-1024
Title Expressing Generalizations In Unification-Based Grammar Formalisms
Venue Annual Meeting of The European Chapter of The Association of Computational Linguistics
Session Main Conference
Year 1989
Authors

This paper shows how higher levels of general- ization can be introduced into unification gram- mars by exploiting methods for typing grammati- cal objects. We discuss the strategy of using global declarations to limit possible linguistic structures, and sketch a few unusual aspects of our type- checking algorithm. We also describe the sort system we use in our semantic representation lan- guage and illustrate the expressive power gained by being able to state global constraints over these sorts. Finally, we briefly illustrate the sort system by applying it to some agreement phenomena and to problems of adjunct resolution.