Term context models for information retrieval

  • Authors:
  • Jeremy Pickens;Andrew MacFarlane

  • Affiliations:
  • FX Palo Alto Laboratory, Inc., Palo Alto, California;City University, Northampton Square, London, UK

  • Venue:
  • CIKM '06 Proceedings of the 15th ACM international conference on Information and knowledge management
  • Year:
  • 2006

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Abstract

At their heart, most if not all information retrieval models utilize some form of term frequency.The notion is that the more often a query term occurs in a document, the more likely it is that document meets an information need. We examine an alternative. We propose a model which assesses the presence of a term in a document not by looking at the actual occurrence of that term, but by a set of non-independent supporting terms, i.e. context. This yields a weighting for terms in documents which is different from and complementary to tf-based methods, and is beneficial for retrieval.