| 摘要 |
In the case where Web service providers and Web service brokers are successively connected in a multistage manner to form a tree structure, with each of the Web service brokers relaying messages to be transmitted and received between a Web service requestor and the Web service providers, not only the performance, states, and configurations of Web service providers which are directly called by a Web service broker, but also those of Web service providers existing in a descendant direction of the tree structure, are made use of as information used to determine a Web service provider to which a request message should be transmitted.
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