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.