A unified behavioural model and a contract language for extended enterprise
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This paper compares two separately developed systemsfor monitoring activities related to business contracts,describes how we integrated them and exploits the lessonslearned from this process to identify a core set ofrequirements for a Business Contract Language(BCL). Concepts in BCL needed for contract monitoringinclude: the expression of coordinated concurrent actions;obliged, permitted and prohibited actions; rich timelinessexpressions such as sliding windows; delegations; policyviolations; contract termination/renewal conditions andreference to external data/events such as change in interestrates. The aim of BCL is to provide sufficient expressivepower to describe contracts, including conditions whichspecify real-time processing, yet be simple enough to retaina human-oriented style for expressing contracts.