EL description logics with aggregation of user preference concepts

  • Authors:
  • Peter Vojtáš

  • Affiliations:
  • Dept. Software Eng., School Comp. Sci., Fac. Math. Phys., Charles Univ. Prague and Inst.Comp.Sci., Czech Acad.Sci., Prague

  • Venue:
  • Proceedings of the 2007 conference on Information Modelling and Knowledge Bases XVIII
  • Year:
  • 2007

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Abstract

We consider querying containing several vague concepts of user's preferences (with preference scale T ), which is quite typical in semantic web. These particular preferences need to be combined to get an overall ordering of results. We propose T-EL@ --a description logic allowing existential restrictions, crisp roles, T -fuzzy concepts and T -fuzzy combining functions @. We discuss problems of consistency, subsumption and the instance problem. We show some results on polynomial complexity of this problem. We conclude with a sketch of an embedding of T-EL@ into a sort of classical EL logic with concrete domain.