Orchestrate services
by Volker Weber
Two proposed XML grammars for describing the orchestration of Web services -- Microsoft's XLANG, used by BizTalk, and IBM's WSFL (Web Services Flow Language) -- were widely expected to have merged by now into a joint World Wide Web Consortium (W3C) submission. That hasn't happened. Meanwhile, Sun, BEA, SAP, and Intalio have introduced a third candidate: WSCI (Web Service Choreography Interface). The relationships among these three proposals -- and others, including Intalio's BPML (Business Process Markup Language) and ebXML's BPSS (Business Process Schema Specification) -- are murky.
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