Query expansion based on thesaurus relations: evaluation over internet

  • Authors:

  • Luiz Augusto Sangoi Pizzato;Vera Lúcia Strube De Lima

  • Affiliations:

  • Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Informática, Programa de Pós-Graduação em Ciência da Computação, Porto Alegre, RS, ...;Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Informática, Programa de Pós-Graduação em Ciência da Computação, Porto Alegre, RS, ...

  • Venue:
  • CICLing'03 Proceedings of the 4th international conference on Computational linguistics and intelligent text processing
  • Year:
  • 2003

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Abstract

In this work we present a heuristic for query expansion and its evaluation with information retrieval over the Internet. We obtained the precision and recall measures for the top-50 documents from 13 different queries. For those we had good results on estimated recall and F-measure values indicating that query expansion is a reasonable technique when few documents are retrieved.