Implementing BPEL4WS: the architecture of a BPEL4WS implementation

BPEL4WS: Workflows and Service Components BPEL4WS [1] provides the most complete realization to date of the workflow execution model in the context of a service oriented architecture. Service oriented architectures introduce a set of very distinctive abstractions that result in significant modifications of the basic workflow model as outlined in pre-existing workflow model, see [2] for example. In particular, the “software as a service” approach results in a componentized view of software applications, and the application of workflow as a component composition mechanism. BPEL naturally supports a multi-party interaction model, and BPEL processes present themselves as service components to other Web services.