A logic-based calculus of events
New Generation Computing
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Science of Computer Programming
Organizing long-running activities with triggers and transactions
SIGMOD '90 Proceedings of the 1990 ACM SIGMOD international conference on Management of data
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Database updates in the event calculus
Journal of Logic Programming
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Journal of Database Management
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PODS '98 Proceedings of the seventeenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
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NGIT '99 Proceedings of the 4th International Workshop on Next Generation Information Technologies and Systems
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COIN'09 Proceedings of the 5th international conference on Coordination, organizations, institutions, and norms in agent systems
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Information Sciences: an International Journal
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Proceedings of the 7th ACM international conference on Distributed event-based systems
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The event calculus is a logic programming formalism for representing events and their effects especially in database applications. This paper presents the use of the event calculus for specifying and simulating workflows. The proposed framework maintains a representation of the dynamic world being modeled on the basis of user supplied axioms about preconditions and effects of events and the initial state of the world. The net effect is that a workflow specification can be made at a higher level of abstraction. Within this framework it is possible to model sequential and concurrent activities with synchronization when necessary. It is also possible to model agent assignment and concurrent workflow instances.