Empower service directories with knowledge

Service-oriented architecture (SOA) is an important, flexible, and widely used software architecture. Web service technology (WST) is an SOA implementation framework that has attracted much attention. In WST, consumers find required services by means of service directories. Current service directories are mainly based on UDDI and suffer from a lack of knowledge that limits the power of them. Service directories work as simple stateless search machines that use service descriptions to find similar services in response to a consumer’s query. Because of the small amount of information that service directories store about web services, they cannot be used effectively. Service directories with more information operate with more power and lower cost. In this paper, to empower service directories, directories are augmented with knowledge about web services that is encoded by a semantic interlinked graph of WST entities. Different operations offered by the resulting service directory and an analysis of their costs are shown through experiments.