A Semantic Repository for Adaptive Services

The semantic characteristics related to the Web services definition are weakly addressed in the original definition of the stack of Web services. Web services languages like WSDL or composition languages like BPEL still have syntactic oriented definitions. Several research activities tend to use semantic based descriptions in order to describe approaches for automatically discovering services and for defining adaptive services. Our claim is that it is needed to proceed as for static data by providing on the one hand another level of abstraction that hides the WSDL descriptions of services and on the other hand a subsumption relationship capable to define a substitutability relationship between semantic Web services. This paper proposes to use a semantic registry, to store semantic Web services (SWS), equipped with an exploitation language that supports semantic based process discovery. Semantic Web services are being described in an ontology of services, with a subsumption relationship. Their input and output parameters refer to concepts of a domain ontology.