Paper: Reversible Delayed Lexical Choice In A Bidirectional Framework

ACL ID C96-2128
Title Reversible Delayed Lexical Choice In A Bidirectional Framework
Venue International Conference on Computational Linguistics
Session Main Conference
Year 1996
Authors

We describe a bidirectional framework for natural language parsing and genera- tion, using a typed feature formalism and an HPSG-based grammar with a parser and generator derived from parallel pro- cessing algorithms. We present an ap- proach to delayed lexical choice in gener- ation, based on subsumption within the sort hierarchy, using a lexicon of nnder- instantiated signs which at'(; derived fi'om the normal lexicon by lexical rules. We then show how delayed lexical choice can be used in parsing, so that some types of ill-formed inputs can be parsed, but well- formed outputs are generated, using the same shared linguistic information. 1 A bidirectional framework In our bidirectional framework for a natural lan- guage engine, the linguistic descriptions in the grammar and lexicon are sh...