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Semantic Web Service Discovery and Integration Using Service Search Crawler

Currently, Web services have been identified as the salient technology in providing a flexible solution for interoperating the heterogeneous application systems. Due to the dramatic increasing number of available Web services, how to discover the relevant services dispersed over a number of service providers is a big challenge. Although, the current service discovery mechanism can be achieved through the public UDDI, the UDDI structure is not powerful enough for computer-interpretation to enable automatic Web service discovery. This research proposes the layered-architecture of semantic service discovery system by incorporating search crawler as a core component for discovering services resided on the provider websites. The search crawler can operate in multi-threaded environment to enhance the capability of discovering a number of distributed Web services simultaneously, as well as in various UDDI registries. In order to enrich service discovery in a semantic manner, the Web services descriptions returned from the search crawlers are thus modeled into a machine-processable representation language such as OWL-S. The system conformed to the proposed architecture will provide the flexibility and extensibility to accomplish complex Web service requests that meet user-specified functional requirements.