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>>Collaboration Types --------------------- After reading section 2.1, I am still not clear why we need the "three" choreography types. What's the business motivation for such grouping? Is it really necessary to introduce some complexity and potential ambiguity in the spec level? For example, - "abstract" vs "concrete" are quite different grouping criteria than "portable". - What's the difference between a "concrete" choreography and an "executable" process?
the level do not exist in the 03 apr 2004 Working draft