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Hits 1 – 2 of 2
1
Linking Semantic and Knowledge Representations in a Multi-Domain Dialogue System
Dzikovska, Myroslave O.
;
Allen, James F.
;
Swift, Mary D.
In: DTIC (2007)
Abstract:
We describe a two-layer architecture for supporting semantic interpretation and domain reasoning in dialogue systems. Building systems that support both semantic interpretation and domain reasoning in a transparent and well-integrated manner is an unresolved problem because of the diverging requirements of the semantic representations used in contextual interpretation versus the knowledge representations used in domain reasoning. We propose an architecture that provides both portability and efficiency in natural language interpretation by maintaining separate semantic and domain knowledge representations, and integrating them via an ontology mapping procedure. The ontology mapping is used to obtain representations of utterances in a form most suitable for domain reasoners, and to automatically specialize the lexicon. The use of a linguistically motivated parser for producing semantic representations for complex natural language sentences facilitates building portable semantic interpretation components as well as connections with domain reasoners. Two evaluations demonstrate the effectiveness of our approach: we show that a small number of mapping rules is sufficient for customizing the generic semantic representation to a new domain, and that our automatic lexicon specialization technique improves parser speed and accuracy. ; Prepared in cooperation with the University of Edinburgh, UK. Sponsored in part by the Defense Advanced Research Projects Agency (DARPA).
Keyword:
*KNOWLEDGE BASED SYSTEMS
;
*NATURAL LANGUAGE
;
*SEMANTICS
;
Computer Programming and Software
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Information Science
;
LEXICOGRAPHY
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LINGO-ERG GRAMMAR
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Linguistics
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MAN COMPUTER INTERFACE
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MRS COMPUTER PROGRAM
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ONTOLOGY
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PARSERS
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SOCIAL COMMUNICATION
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SPEECH
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SYNTAX
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TEST AND EVALUATION
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TRIPS COMPUTER PROGRAM
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UDRS COMPUTER PROGRAM
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VOCABULARY
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Voice Communications
;
WORDS(LANGUAGE)
URL:
http://www.dtic.mil/docs/citations/ADA534412
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA534412
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2
Techniques for Automatically Generating Biographical Summaries from News Articles
Esparza, Matthew W.
In: DTIC (2007)
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