Summary
JavaWorld has published an article that gives a good introduction to BPEL, the Business Process Execution Language. It explains how BPEL allows you to define business processes through coordination of web services that comprise the behavior of the process.
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In BPEL: Service Composition for SOA, author Matjaz B. Juric walks through an example of using BPEL to define a business process by stitching together web services. An excerpt from the book, Business Process Execution Language for Web Services, by Matjaz Juric, Poornachandra Sarang, and Benny Mathew, the article explains the goal of BPEL and provides a code example.