Abstract

The formal description of Web service is the basis for analyzing and verifying the Web service composition. In this article, a simple pattern-oriented mathematical model for Web service composition is introduced according to following steps: firstly, single service model is formally defined; secondly, several kinds of interaction logics between services are discussed and the composition pattern is presented, the realization of the interaction logics are given at the same time; thirdly, the definition of Web service composition model and the algorithms are presented; finally, a running example is discussed based on our model. The model can express the interactive logic relationships between messages well and it can also be used to simulate the interaction between services via message passing.

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