Applied Research, Rdf, Ontology Technology-based Semantic Web

IBM and Microsoft Corporation first present the concept of e-commerce oriented-service and define some protocols such as SOAP,WSDL and UDDI about Web Services. The description of web services can be described by some different conceptional systems. Every system can use the same conception to express the different meanings or use the different conceptions to express the same meaning. However,there hasn't been any semantic information used in UDDI and WSDL,thus information can only be searched by keywords not by semantics and web services matching in different conceptional systems can't be implemented.In order to add some semantic information to web services description,we use the key technologies about Senmantic Web,such as XML RDF and Ontology.The Semantic Web is a new type of Web which will bring structure to the meaningful content of Web pages. Computers can understand the contents on the Web and perform some judgements and inferences on it.Using the technologies about Semantic Web in the processes of registering, publishing and finding of web services can make the provider of web services describe the web services more accurately and make the manager of web services organize and manage the web services more in order. The Registry can implement dynamic finding, binding and adjusting.The main reseach works we do are as follows:1. The Web Services technology is based on XML language. It provides the mechanism of information exchanging and business services finding. Semantic Web uses the public Ontology Database to improve the way of intercommunion in systems that use the different terms, and Semantic Web provides machine-readable meaning for the resources on the Web. In this paper, we first introduce the key technologies about Web Services and Semantic Web.In the following, we present a Semantic Web Service Description Model based on the principle of Semantic Web. We emphasize our research on the services semantic description and implementation. We also give one example to explain how to describe service with DAML-S.2. Using the knowledge representation technologies in the processes of web services description and matching can improve the ability that satisfies the requester's requirements about automatic web services finding, and reduces the workload of finding and selecting by manual work. According to the upper contents, we discuss the processes of web services description, finding and matching which are on the basis of semantics.3. The key of web service finding is web service matching. The better matching methods can help the requesters to find more approving services. In this thesis, we study the methods of services matching at present, and on the basis of the webservices semantic description , we discusse the processes of finding services, and put forward one service matching algorithm.4. We discuss the implementary framework of web services based on the semantics in the end. We use the key technologies of Semantic Web in the Web Services, design the web services framework which is based on the semantics, and expound the thinking of implementation and some parts of the algorithms.