In this article the author focuses on one critically important Web services specification that has been largely overlooked: the Business Process Execution Language for Web Services (BPEL4WS, or BPEL). He describes why BPEL is important and what it offers you if you are implementing Web services today or planning to in the future. Concrete examples using BizTalk Server 2004 are presented in the article.
MSDN Magazine March 2005
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