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Automatic Checking of Functional Closeness of Web service Composite System

the function closure in Web service composite system is the premise to ensure the correct interaction of the system. This paper realized the automatic detection of function closure in Web service composite system. Firstly, the syntax and semantic interface of Web service is defined and parameter mapping is set up by using of semantic relationship among the parameters. Secondly, the mapping relationship of sending actions and receiving actions is established by merging the parameters of the same action in the same service. Finally, the functional closure of web service composition system can be determined by checking whether all the sending actions have corresponding receiving actions and the receiving parameters in each receiving action have corresponding sending parameters. The algorithms are designed to realize parameter mapping, action mapping and system function closure detection automatically. The effectiveness of the proposed method is verified by an example of network file system.