Research On Semantic Web Based Web Service Discovery

Web services have altered the traditional mode of web applications, the web is changing itself from an information storage & provider to a service provider: to help web users accomplish their task in a best manner by the standardized interfaces and comprehensive service descriptions provided. The two key technologies around web service are description and discovery of web service. The first one present standard and simpleness to web services and make them interoperable; the discovery of web service allows the service requestor to find out the most suitable functionality, and make the automatic composition of web service possible. But current web service technologies such as WSDL/UDDI only describe the basics of web service and the discoveries are frame-based, which obviously don't fulfill the requirements for the automatic discovery and composition of web service. However, the characteristic of web service-- functionality provider--suggest us to describe the semantics of the web service in a structural form which can be computer-interpreted, thus the problem of web service discovery can be transformed into the semantic based reasoning process, and then we can exploit the advantages of the KM domain. The semantic based discovery directly supports the automated composition of web service.On the other hand, research on the semantic web is progressing: semantic web is the next generation of web which extend the current web by enhance its' semantic representation of web resources, so the computer can process web data automatically; the base semantic web languages RDF and OWL has become the recommendation of W3C; other web service-oriented languages such as DAML-S, OWL-S try to describe web service semantics from ontology perspective.This paper studies the semantic description of web service & its functionality, discusses its effective semantic web based discovery. Firstly, it introduces the background of web service and its discovery mechanism, semantic web and ontology, the semantic web language OWL/OWL-S; then discusses the issue of applying semantic web in web service discovery; finally it proposes an OWL-S rooted language AWSSDL, which then be used to realize automated semantic web based web service discovery, it also presents a semantic enhanced UDDI web service discovery framework.