Facilitating Service Discovery with Semantic Overlay

Service Oriented Architecture (SOA) and Peer-to-Peer (P2P) computingshare many common characteristics. It is believed that the combinationof the two emerging techniques is a very promising method in promotingthe web services (WS). Because the service discovery plays a key role inthe integration, here a P2P-based framework to manage theknowledge of service and locating services is proposed. In this paper, the detailsof the principle, constructing and maintaining of service semanticoverlay architecture have been described, and the way how the semanticoverlay facilitates discovery of service resources is illustrated. Toenable the semantic web service superiority, Service Ontology, which isconsidered as the service semantic model, is employed to depict service.The service discovery includes two phases: searching on the servicesemantic overlay; and local discovery in peer's service repository.Various solutions have been proposed to realize those two phases.Furthermore, tests are carried out to evaluate service discovery on thearchitecture.