Réécriture de requêtes en termes de vues en présence de contraintes de valeurs pour un système d'intégration de sources de données agricoles

Abstract : This thesis addresses the problem of query rewriting using views in the presence of value constraints. Value constraints allow for restricting value domain of a given attribute. They have been receiving a lot of attention because of their usefulness in the ontology web language OWL and in practical applications This work is motivated by a real application that aims at providing a scalable and exible integration system for agricultural data sources. The investigation of this problem is based on the description logics framework that allows for studying the problem decidability. This work provides also a mapping between the problem of computing rewritings due to the presence of value constraints and the framework of Knowledge Discovery in Database (KDD) introduced by Mannila and Toivonen. That enables us to reuse existing and ef cient algorithms to effectively compute rewritings and propose a scalable prototype of rewriting.
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  • HAL Id : tel-00684041, version 1

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Hélène Jaudoin. Réécriture de requêtes en termes de vues en présence de contraintes de valeurs pour un système d'intégration de sources de données agricoles. Algorithme et structure de données [cs.DS]. Université Blaise Pascal - Clermont-Ferrand II, 2005. Français. ⟨NNT : 2005CLF21618⟩. ⟨tel-00684041⟩

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