Flexible querying with fuzzy projection

  • Authors:

  • Krzysztof Dembczyński;Maciej Hapke;Dominik Przybył

  • Affiliations:

  • Institute of Computing Science, Poznań University of Technology, Poznań, Poland;Institute of Computing Science, Poznań University of Technology, Poznań, Poland;Institute of Computing Science, Poznań University of Technology, Poznań, Poland

  • Venue:
  • AWIC'05 Proceedings of the Third international conference on Advances in Web Intelligence
  • Year:
  • 2005

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Abstract

In the paper we present a new operation called fuzzy projection that extends flexible querying languages. It consists in fuzzification of tuples for all linguistic variables defined on domains of attributes specified in a query. In result, tuples with linguistic variables, instead of original values, are displayed. On the basis of fuzzy projection a specific fuzzy group-by operation is introduced. These two operations are implemented as a part of SQLf_j language based on SQLf introduced by Bosc and Pivert.