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Repairing Queries in a Mediator Approach

Alain Bidault, Christine Froidevaux, Brigitte Safar

In this paper, we study unsatisfiable queries posed to a mediator in an information integration system and expressed in a logical formalism. First, we characterise conflicts as the minimal causes of the unsatisfiability of a query. Then, thanks to our cooperative query answering process, we produce its set of repairs. A repair is a query that does not generate any conflict and that has a common generalisation with the initial query and is semantically close to it.

Keywords: Cooperative Answering, Query Failure, Information Integration Systems, Diagnosis

Citation: Alain Bidault, Christine Froidevaux, Brigitte Safar: Repairing Queries in a Mediator Approach. In W.Horn (ed.): ECAI2000, Proceedings of the 14th European Conference on Artificial Intelligence, IOS Press, Amsterdam, 2000, pp.406-410.


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ECAI-2000 is organised by the European Coordinating Committee for Artificial Intelligence (ECCAI) and hosted by the Humboldt University on behalf of Gesellschaft für Informatik.