Abstract:

After the Web service matching method which aims only at the single Web service and the dynamic composition method which aims at multiple Web services have been analyzed, a formal description of semantic Web service is proposed, based upon which a semantic Web service registry structure oriented for the composed Web service and the corresponding data maintenance algorithm have been implemented. In the meantime, a Web service model and discovery algorithm oriented for the composed Web service are proposed, which can be used to semantically match single Web service, and also to search in those composed Web services to find a composite Web service or composition Web service fragment which satisfy the search requests so that the composed Web service can be reused and the efficiency of the discovery can be improved.

Key words: service composition, Web service, service discovery;  service composition fragment