Abstract: With the rapid development and extensive application of Web services,how to find a Web services that users need in many Web services becomes a key issue. Based on semantic Web service's research, we proposed a framework of semantic Web service discovery based on multi-phase matching. We divided the entire discovery process into service type,service function, service name and service text statements matching four stages. In service function matching stage, for the density between concepts on domain ontology library, we proposed the improved GCSM algorithm based on the amount of information. In the service name and text statements matching stage, for polysemy problem, we proposed a disambiguation strategy based on instances and basic meaning. Finally, the discovery framework was proved to be feasible and effective.

Key words: Semantic Web service, Service discovery, Word sense disambiguation, Ontology, Amount of information