Process-oriented workflow systems require transactional support in order to guarantee consistent and reliable execution of business processes in a multi-user and non failure free environment. Classical (ACID) transactions are too constraining for long-lived computations, like workflow applications. Therefore, transaction relevant requirements of such applications are investigated and the basic concepts of a new kind of transactions - workflow transactions - are presented. The motivation is to integrate advanced transaction concepts into workflow models in order to define and support a transaction based execution of process-oriented workflows.

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Handbook of the Workflow Management Coalition (WfMC)

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