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Nowadays, e-government has emerged as a government policy to improve the quality and efficiency of public administrations. By exploiting the potential of new information and communication technologies, government agencies are providing a wide spectrum of online services. These services are composed of several web services that comply with well defined processes. One of the big challenges is the need to optimize the composition of the elementary web services. In this paper, the authors present a solution for optimizing the computation effort in web service composition. Their method is based on Graph Theory. They model the semantic relationship between the involved web services through a directed graph.
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