Web service orchestrations aim at offering value-added services that meet the increasing complex requirements of business processes. Since it becomes harder to manually check the correctness of such systems, we propose a formal method for their consistency checking by first translating OWL-S composite services and WS-BPEL orchestrator into communicating automata using an iterative process driven by control structures of these languages. Thereafter, we build the synchronization product of the resulting automata and proceed to its compatibility checking in order to unveil forbidden states, which depict incompatibilities in that orchestration interaction protocol. Last, this automaton consistency is checked against the behavioral model of WS-CDL choreography seen as its specification to which it has to conform.

Web服务编排旨在提供满足业务流程日益增长的复杂要求的增值服务。由于手动检查此类系统的正确性变得更加困难，因此我们提出了一种正式的方法来进行一致性检查，方法是首先使用由这些语言的控制结构驱动的迭代过程将OWL-S组合服务和WS-BPEL编排器转换为通信自动机。此后，我们构建生成的自动机的同步产品，并进行兼容性检查以揭示禁止状态，这些禁止状态描述了该业务流程交互协议中的不兼容性。最后，将自动机一致性与WS-CDL编排的行为模型进行对照，该行为模型被视为其必须遵循的规范。