Lexical Discovery with an Enriched Semantic Network
WordNet@ACL/COLING(1998)
摘要
The study of lexical semantics has produced a sys- tematic analysis of binary relationships between con- tent words that has greatly benefited lexical search tools and natural language processing algorithms. We first introduce a database system called FreeNet that facilitates the description and exploration of fi- nite binary relations. We then describe the design and implementation of Lexical FreeNet, a semantic network that mixes WordNet-derived semantic re- lations with data-derived and phonetically-derived relations. We discuss how Lexical FreeNet has aided in lexical discovery, the pursuit of linguistic and fac- tual knowledge by the computer-aided exploration of lexical relations. 1 Motivation This paper discusses Lexical FreeNet, a database system designed to enhance lexical discovery. By this we mean the pursuit of linguistic and factual knowledge with the computer-aided exploration of lexical relations. Lexical FreeNet is a semantic net- work that leverages WordNet and other knowledge and data sources to facilitate the discovery of non- trivial lexical connections between words and con- cepts. A semantic network allied with the proper user interface can be a useful tool in its own right. By organizing words semantically rather than alphabet- ically, WordNet provides a means by which users can navigate its vocabulary logically, establishing con- nections between concepts and not simply character sequences. Exploring the WordNet hyponym tree starting at the word mammal, for instance, reveals to us that aardvarks are mammals; exploring Word- Net's meronym relation at the word tv, mr*al reveals to us that mammals have hair. From these two explorations we can accurately conclude that aard- varks have hair. Lexical exploration need not be limited to one step at a time, however. Viewing a semantic network as a computational structure awaiting graph-theoretic queries gives us the freedom to demand services be- yond mete lookup. "Does the aardvark have hair?", or "What is the closest connection between aard- varks and hair?" or "How interchangably can the words aardvark and anteater be used?" are all reasonable questions with answers staring us in the 135
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关键词
lexical semantics,binary relation,natural language processing,user interface,database system,semantic network
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