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Conception physique des bases de données à base ontologique : le cas des vues matérialisées

Abstract : The high volume of data described by ontologies led to the creation of Ontology-BasedDatabase (OBDB). Many communities are interested in this technology and have proposed solutionsto persist semantic data in DBMS.Meanwhile, the physical design has become an essential step in the life cycle of databasedesign, in which optimization structures are selected. While many studies have been conducted on thephysical design in the context of traditional databases, few have focused on the physical design inOBDB which is more complex. This complexity is due to the diversity of OBDB which focuses onformalisms supported, storage models and architectures used.To guide the selection of optimization structures, we have developed a cost model to estimatethe cost of queries in OBDB. The theoretical results are compared with the practical results obtainedfrom six OBDB including three industrial (Oracle, IBM SOR and DB2RDF) and three academic (Jena,Sesame and OntoDB of the LIAS Lab of ISAE-ENSMA). This cost model was used in thematerialized views selection process. We proposed two approaches of materialized views selection: aconceptual approach where the selection of materialized views is made on the classes and propertiesused by queries and a simulated approach where the selection takes into account the diversity ofOBDB. Experiments were conducted to evaluate the quality of our approaches and compare them withthe main existing work
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Bery Leouro Mbaiossoum. Conception physique des bases de données à base ontologique : le cas des vues matérialisées. Autre [cs.OH]. ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechique - Poitiers, 2014. Français. ⟨NNT : 2014ESMA0014⟩. ⟨tel-01129077⟩

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