Abstract
A web service composition is able to create a new service by incorporating some existing web services. Currently, Web Service Business Process Execution Language or WS-BPEL is a promising language used to describe the web service composition. Since in the real world most of business processes have been involved temporal context and they are quite complex interaction, it is impossible to completely eliminate all failures in them. Therefore, a formal verification is required to assure the correctness and reliability of the web service composition. In this paper, timed trace theory has been applied to verify the web service composition with temporal constraints. Both safety and timing failures can be examined. Experimenting with a ticket reservation system, the proposed approach shows its effectiveness.
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