Grid Environments Based On Semantic Service Discovery Problem

With the increasing development of information technology and the quickening of the information networking and social process, the information project has made a certain improvement. However, some new problems, requirements and challenge appear on the information way. The new problem is that information can not share and be integrated, and the distributed resources can not be made use effectively. On the base of the analysis of the reasons for it, this paper puts forward that Integrating grid technology and ontology, and building a uniformed semantics based information system integrating and interoperating platform realize information sharing, and quicken the step of information.In this paper, we discuss a semantic grid system LF-Grid to support the data integration on the background of labor force market. First, on the basis of the actual requirement of system, we give the architecture of LF-Grid, and describe the functionality of all modules. We detailedly discuss the relevant three problems about the ontology-based service discovery.(1) research on semantic description of grid serviceThis section discusses How to define and express grid service. The purpose of service description is to provide a standard way to describe for the service provider and the service request, and it serves the discovery foundation. Based on service discovery demand, This article first analyzes each service description language ,and then refers to Web service ontology OWL-S, and according to the WSDL 2.0 editions may the extension, Proposes to extend the semantic description of service functional information in the WSDL document, in order to serve the discovery to lay the good foundation.(2) research on extended semantics of UDDIIn order to realize the extended service description to effectively issue, This paper uses the UDDrs data entity tModel characteristic, Through registering the service description semantic information by the tModel form to the UDDI center, to realize the use of extended service description in UDDI center, so as to provide the foundation to realize highly effective, accurate serves the discovery.(3) research on the semantic discovery of grid serviceAccording to the requirement of intellectualization and highly effective, this section mainly studies How to carry on the service discovery based on the advertising...