Which Way for BPMN 2.0?

Surprisingly little information has reached public view concerning BPMN 2.0, the update of the Business Process Management Notation standard now under consideration in OMG. Unlike most standards approval processes, the outcome of this one is not preordained. There are two submissions, quite different, and it could go either way.

Oracle's Vishal Saxena notes that one reason BPMN 1.x has been so successful is that it "keeps simple things simple" by focusing on abstract business-level modeling, allowing developers flexibility in how to implement the technical details, and argues that BPMN 2.0 "should maintain this flexibility." In response, IDS Scheer's Sebastian Stein points out that a problem with BPMN 1.x is that it "only has implicitly defined execution semantics," and BPMN 2.0 needs to make them explicit. He goes on to neatly summarize the competing proposals:At the current point there are two different approaches discussed within OMG: