Semantic Annotation of Web Services

Web services are the latest attempt to revolutionize large scale distributed computing. They are based on standards which operate at the syntactic level and lack semantic representation capabilities. Semantics provide better qualitative and scalable solutions to the areas of service interoperation, service discovery, service composition, and process orchestration. SAWSDL defines a mechanism to associate semantic annotations with Web services that are described using Web Service Description Language (WSDL). In this paper we propose an approach for semi-automatically annotating WSDL Web services descriptions. This allows SAWSDL Semantic Web Service Engineering. The annotation approach consists of two main processes: Categorization and Matching. Categorization process consists in classifying WSDL service description to its corresponding domain. Matching process consists in mapping WSDL entities to pre-existing domain ontology. Both categorization and matching rely on ontology matching techniques. A tool has been developed and some experiments have been carried out to evaluate the proposed approach.