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While WS-BPEL is emerging as the prominent language for modeling executable business processes, it provides limited support for designing flexible processes. An important need of adaptive processes is for concurrent activities in the process to respect coordination constraints. These require that concurrent activities coordinate their behaviors in response to events otherwise the process may become inconsistent. The authors shows how the constraints that necessitate coordination may be represented in WS-BPEL, and use generalized adaptation and constraint enforcement models to provide a way to transform the traditional BPEL process to an adaptive one.
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