Business Process Execution Language (BPEL) or Web Services Business Process Execution Language (WS-BPEL) is an OASIS standard executable language for specifying actions within business processes with web services [1]. And Windows Workflow Foundation (WF) is a Microsoft technology that provides an API, an in process workflow engine, and a rehostable designer to implement long running processes as workflows within .NET applications. The current version of WF was released as part of the .NET Framework version 4[2].
