Types in Functional Unification Grammars

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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 extension in the context of a grammar used for text generation.
Original languageEnglish GB
Title of host publication28th Annual Meeting of the Association for Computational Linguistics, 6-9 June 1990, University of Pittsburgh, Pittsburgh, Pennsylvania, USA, Proceedings
EditorsRobert C. Berwick
PublisherAssociation for Computational Linguistics (ACL)
Number of pages8
StatePublished - 1990


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