Function Level Web Service Discovery Based on Category Function Tree

The potential of web services comes from web service composition, where a series of single web services are chosen and composed to perform compound functionalities. As to Web service composition technology, the key step is function-level Web service discovery, which decides the classes of Web services chosen for the final purpose. This paper proposes a proto model for function-Level Web service discovery. Firstly, the idea is accepted that functions in an application category are limited and therefore can be listed and decomposed in a category function tree. Given users´ function requirements for composition, it is possible to locate it exactly on the tree and decide how this function can be decomposed downside the tree to sub-functions, this procedure continues until it reaches the leaf-nodes of the tree whose functions can be described by abstract service classes. Finally, an application example is given to demonstrate the whole idea discussed.