Flexible Composition of Enterprise Web Services

The process-based composition of Web services is emerg- ing as a promising approach to automate business process within and across organizational boundaries. In this approach, individual Web ser- vices are federated into composite Web services whose business logic is expressed as a process model. Business process automation technol- ogy such as worko w management systems (WFMSs) can be used to choreograph the component services. However, one of the fundamental assumptions of most WFMSs is that worko w schemas are static and predened. Such an assumption is impractical for business processes that have an explosive number of options, or dynamic business pro- cesses that must be generated and altered on the y to meet rapid changing business conditions. In this paper, we describe a rule infer- ence framework called DYflow, where end users declaratively dene their business objectives or goals and the system dynamically com- poses Web services to execute business processes.