transaction pattern

a pattern of process steps, alternately taken by two actor roles. The basic transaction pattern consists of the process steps ‘request’, ‘promise’, ‘state’, and ‘accept’ (Note: in between the promise and the state act, the production act is performed; it precedes immediately and unconditionally the state act, but it is not considered a process step itself). The standard transaction pattern contains in addition the process steps ‘decline’, ‘quit’, ‘reject’, and ‘stop’. The complete transaction p

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