An English language question answering system for a large relational database
Communications of the ACM
Theory of Syntactic Recognition for Natural Languages
Theory of Syntactic Recognition for Natural Languages
Cooperative responses from a portable natural language data base query system.
Cooperative responses from a portable natural language data base query system.
ACL '80 Proceedings of the 18th annual meeting on Association for Computational Linguistics
Interpreting natural language database updates
ACL '81 Proceedings of the 19th annual meeting on Association for Computational Linguistics
Dynamic strategy selection in flexible parsing
ACL '81 Proceedings of the 19th annual meeting on Association for Computational Linguistics
A construction-specific approach to focused interaction in flexible parsing
ACL '81 Proceedings of the 19th annual meeting on Association for Computational Linguistics
Towards a self-extending parser
ACL '79 Proceedings of the 17th annual meeting on Association for Computational Linguistics
Ungrammaticality and extra-grammaticality in natural language understanding systems
ACL '79 Proceedings of the 17th annual meeting on Association for Computational Linguistics
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The advantages of a multi-strategy, construction-specific approach to parsing in applied natural language processing are explained through an examination of two pilot parsers we have constructed. Our approach exploits domain semantics and prior knowledge of expected constructions, using multiple parsing strategies each optimized to recognize different construction types. It is shown that a multi strategy approach leads to robust, flexible, and efficient parsing of both grammatical and ungrammatical input in limited-domain, task oriented, natural language interfaces. We also describe plans to construct a single, practical, multi-strategy parsing system that combines the best aspects of the two simpler parsers already implemented into a more complex, embedded-constituent control structure. Finally, we discuss some issues in data base access and update, and show that a construction-specific approach, coupled with a case structured data base description, offers a promising approach to a unified, interactive data base query and update system.