Workkow Execution through Distributed Events Workkow Execution through Distributed Events

Workkows are the semantically appropriate units of activity in heterogeneous environments. Heterogeneous environments, which are extremely common in enterprises of even moderate complexity, involve a number of database systems, each with its own interfaces, applications, and users. It is typically not possible to violate the autonomy of these systems, even though it is essential to have them interoperate properly. Workkows are activities carried out in heterogeneous environments that impinge upon a number of autonomous systems. The semantics of workkows are best represented by diierent extended transaction models, or combinations thereof. We present an approach by which workkows can be eeciently scheduled in a distributed manner.