The Business Process Execution Language (BPEL) is a vendor-neutral mechanism for describing the behavior of business processes. Originally created by Microsoft, IBM, and others, the latest version of this technology is currently being standardized by a larger group working through OASIS. The goal of this short paper is to explain the value of BPEL and to briefly describe how Microsoft supports BPEL in BizTalk Server 2004.
Read it here.
N.B. This paper will be posted on MSDN in the next few weeks.