1Berners -- Lee et al. The Semantic Web, Scientific American,May 2001.
2Perschner, A. Ontology based personalized search[MS. Thesis].Lawrence, KS: University of Kansas, 1999:4--17.
3Prem Melville. Content--boosted collaborative filtering for improved recommendations. In Proceedings of AAAI- 2002,Edmonton, Canada, July 2002:187-192.
4Wu ,Y. H. et al. Enabling personalized recommendation on the web based user interests and behaviors. In proceedings of the 11th international workshop on research issues in data engineering,Heidelberg, GERMANY, April 2001:17-- 24.
5Claypool, M. , Le et al. Implicit interest indicators. In Proceedings of the ACM intelligent user interfaces conference (IUI),Santa Fe, NM, USA, January 2001.14-17.
6Andrew I. Schein et al. Methods and metrics for cold--start recommendations. In Proceedings the 25th annual International ACM SIGIR Conference on Research and Development in Information Retrieval, August 2002 . 37-- 46.
7Middleton et al.Exploiting Synergy between Ontologies and Recommender Systems. In Proceedings Semantic Web Workshop of WWW2002, Hawaii, USA, May 2002:34--43.
8OWL Web Ontology Language 1. 0 Reference, W3C Working Draft 12 November 2002, http://www, w3. org/TR/2002/WD--owl--ref--20021112/.
