Fine-grained Semantic Web Service Discovery Based on Service Operation

摘要

Web service discovery is a mechanism to obtain descriptions of Web services based on the requesters functional or non-functional requirements. At present, many service matchmaking algorithms and service discovery mechanisms have been proposed. However, most of them deem that a service only provides a single service operation or several separate service operations and discovery services on the granularity of the whole service description. In fact, a service can advertise several service operations which interrelate with one another. But only if the request satisfies the requirement of single service operation, the service can provide some functions. More than that, the operation can be composed together to provide complicated function. Therefore, this paper proposes the three-phase service discovery mechanism, which takes service operations into account and researches fine-grained semantic web service discovery. Based on the domain concept ontology, the service and its operations are annotated to add semantic information, by which the service request and the service advertisement are matched in Semantics using the three-phase service discovery mechanism. With a serial of experiments, the resulting data illustrate the proposed method can outperform others in terms of the recall rate and precision.