2What is an ontology?[CP/OL]. [2011-02-10]. http: //www-k sl.stanford.edu/ksl/what -is-an-ontology.html.
3Moldovan D l,Mihalcea R.Using WordNet and lexical operators to improve Intemet searches [J]. IEEE Intemet Computing,2000(4) :34-43.
4Fellbaum C. WordNet:an electronic lexical database [ M ]. Camhridge, MA :The MIT Press, 1998.
5Kruse P.M,Naujoks A,Roesner D,et al. Clever search: A wordnet based wrapper for Internet search engines [C ]//Proceeding of the 2th GennaNet Workshop,2005.
6Guha R,McCool R,Miller E.Semantic search [C]// WWW'03:Pmceedings of the 12th International Conference on World Wide Web,ACM Press,2003:700-709.
7Gruber T R.A translation approach to portable ontologies.Knowledge Acquisition,1993,5(2):199~220.
8Stuart R,Peter N.Artificial intelligence:A modern approach.Beijing:Pearson Education North Asia Limited and People’S Posts and Teleeommunications Press,2002,229-231.
9Nilsson N J.Artificial intelligence:A new synthesis.Beijing:Claim Machine Press and Morgan Kaufmann Publishers,Inc,1999,215-316.
10Gruber T R. Towards principles for the design of ontologies used for knowledge sharing. International Journal of Human-Computer Studies, 1995,907-928.