The paper is devoted to the discussion on the problem of provision of the content-based access to scientific information resources. We suggest solving this problem by means of creation of specialized topic-oriented Internet portals. The information basis of such portals is an ontology that supports integration of information resources relevant to the subject domain of a portal into a uniform information space and provides formulation of user queries in terms of the subject domain and knowledge-driven navigation through the information space of the portal.
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