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The Role of Ontology

An Ontology is specification of conceptualization which consists of a vocabulary and a theory [2]. The role of ontologies in our approach is fourfold: (a) providing knowledge for agents to infer information which is relevant to user's requests, (b) filtering and classifying information (c) indexing information gathered and classified for browsing , and (d) providing a pre-defined set of terms for exchanging information between human and agents.