Disambiguating hypernym relations for Roget's thesaurus

Authors:
Alistair Kennedy;Stan Szpakowicz
Affiliations:
School of Information Technology and Engineering, University of Ottawa, Ottawa, Ontario, Canada;School of Information Technology and Engineering, University of Ottawa, Ottawa, Ontario, Canada and Institute of Computer Science, Polish Academy of Sciences, Warsaw, Poland
Venue:
TSD'07 Proceedings of the 10th international conference on Text, speech and dialogue
Year:
2007

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Abstract

Roget's Thesaurus is a lexical resource which groups terms by semantic relatedness. It is Roget's shortcoming that the relations are ambiguous, in that it does not name them; it only shows that there is a relation between terms. Our work focuses on disambiguating hypernym relations within Roget's Thesaurus. Several techniques of identifying hypernym relations are compared and contrasted in this paper, and a total of over 50,000 hypernym relations have been disambiguated within Roget's. Human judges have evaluated the quality of our disambiguation techniques, and we have demonstrated on several applications the usefulness of the disambiguated relations.