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Retrieving accurate information from the Web is a great challenge to users. The existing information retrieval systems are mostly term-based and thus need to be enhanced toward knowledge-based. User information needs need to be better captured in order to deliver personalized search results. In this paper, an ontology-based framework is proposed for capturing user information needs using a world knowledge base and the user's local instance repository. The framework aims to discover a user'sdoi:10.1109/wiiat.2008.226 dblp:conf/webi/TaoLZN08 fatcat:l52qvkelubfvxpjtmteacpmfwe