Paper: Types In Functional Unification Grammars

ACL ID P90-1020
Title Types In Functional Unification Grammars
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 1990

Functional Unification Grammars (FUGs) are popular for natural language applications because the formalism uses very few primitives and is uniform and expressive. In our work on text generation, we have found that it also has annoying limitations: it is not suited for the expression of simple, yet very common, taxonomic relations and it does not allow the specification of completeness conditions. We have implemented an extension of traditional functional unification. This extension addresses these limitations while preserving the desirable properties of FUGs. It is based on the notions of typed features and typed constituents. We show the advantages of this exten- sion in the context of a grammar used for text genera- tion.