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Construction d'un Web sémantique multi-points de vue

Lê Bach Thanh
Abstract : In this thesis, we study problems of heterogeneity and consensus in a corporate semantic Web. In the semantic Web, an extension of the current Web, information is given well-defined meaning so that machines and agents can « understand » and process them automatically, in order to facilitate the end-user tasks. A corporate semantic Web is a semantic Web dedicated to an enterprise or an organization. The objective of this thesis is to allow the construction and the exploitation of such semantic Web, in a heterogeneous organization comprising various sources of knowledge and various user categories, without eliminating heterogeneity but by making heterogeneity and consensus cohabit in the whole organization. In the first part, we study thoroughly the ontology heterogeneity problem. Ontology is one of the most important fundamental elements in the semantic Web. Several different ontologies can coexist in a heterogeneous organization. To facilitate information exchange where information is encoded by various ontologies, we study algorithms allowing to align already existing ontologies. The proposed algorithms enable to align ontologies represented in different ontology languages recommended by W3C for the semantic Web: RDF(S) and OWL. These algorithms are evaluated through alignment tool evaluation campaigns. In the second part, we are interested in the problem of building new ontologies in a heterogeneous organization by taking into account different viewpoints, different terminologies of various users, groups or even communities in the organization. Such ontology, called multi-viewpoint ontology, enables to have both heterogeneity and consensus co-exist in a heterogeneous organization. We propose a multi-viewpoint knowledge representation model, called MVP, and a multi-viewpoint ontology language, called MVP-OWL, which is an extension of the ontology language OWL, to allow the construction and the exploitation of the multi-viewpoint ontology in a corporate semantic Web.
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https://pastel.archives-ouvertes.fr/pastel-00001989
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Submitted on : Monday, June 18, 2007 - 8:00:00 AM
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Lê Bach Thanh. Construction d'un Web sémantique multi-points de vue. domain_other. École Nationale Supérieure des Mines de Paris, 2006. English. ⟨pastel-00001989⟩

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