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Finding Successful Queries in a Mediator Context

  • Alain Bidault
  • Christine Froidevaux
  • Brigitte Safar
Conference paper
Part of the Advances in Soft Computing book series (AINSC, volume 7)

Abstract

In this paper, we study failing queries posed to a mediator in an information integration system and expressed in the logical formalism of the information integration system PICSEL1. First, we present the notion of concept generalisation in a concept hierarchy that is used to repair failing queries. Then, we address two problems arising while rewriting a query using views. The first problem concerns queries that cannot be rewritten due to a lack of sources, the second one concerns queries that have only unsatisfiable rewritings.

Keywords

Description Logic Integrity Constraint Direct Generalisation Inductive Logic Programing Concept Hierarchy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Alain Bidault
    • 1
  • Christine Froidevaux
    • 1
  • Brigitte Safar
    • 1
  1. 1.L.R.I., C.N.R.S and Université Paris-Sud Bâtiment 490Orsay CedexFrance

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