Un système d'aide à la recherche d'information en ligne basé sur les ontologies (SA-RI-Onto)

MOTS-CLÉS : recherche d'information en ligne, construction d'ontologies ABSTRACT. The huge number of available documents on the Web makes finding relevant ones challenging. Thus, searching for information becomes more and more complex because of the growing volume of data and of its lack of structure. The quality of results that traditional full-text search engines provide is still not optimal for many types of user queries. The ambiguities of natural languages and abstract concepts are handled inadequately by full- text search engines. Ontologies provide a solution to these problems. An architecture composed of several ontologies is proposed to represent concepts as well as services of domain. In this paper, we expose the contribution of these ontologies in information retrieval and we propose a new retrieval system based on ontologies. Experimentation in the domain of the tourism is presented, and the gotten results are compared to other systems.