Abstract
Web service discovery is an important operation in Web service architecture, this paper aims to cluster the Web services before Web service discovery based on OWL-S language. In this paper, Web service ontology is defined. We use Web service function and progress to calculate similarity. Petri net is used to describe Web service process. The Web service similarity is based on an accurate concept semantic similarity of the domain ontology. A domain ontology hierarchy is defined to describe the concept semantic information. The concept semantic similarity is discussed from several aspects, such as the path between two concepts, the path weight, the density of concepts, and the antisense relationship. Finally, we use the Web service similarity to cluster services, and prove the similarity efficiency.
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