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Subject: RE: [wsbpel] Groups - BPEL Goals and Nuances for 1st F2F.ppt uploaded
Message text written by INTERNET:jevdemon@microsoft.com > Document Description: Presented by Satish Thatte (Microsoft) at the 5/28 F2F in Armonk, NY. <<<< Satish, Thanks for providing this. Finally we have something that approximates to some requirements - except at one or two levels down into the technology layers, below the behaviours and scope layers. What your analysis emphasizes is the need to have those higher levels of requirements - as a means to resolve the issues in the technology layers. And then there is the implementation models - we appear to have at least two technical mechanisms - and that makes one nervous in terms of the robustness and interoperability. BPSS solved this beautifully for the eBusiness domain by constraining the model to actions, steps and binary couplings, so that interaction between partners is instantly discernable, and the scope of impacts is limited within an action only. It seems to me - that if you adopt this BPSS model for external interactions - at least for V1.0 of BPEL - you will dramatically reduce the complex of the spec', and also solve a lot of your requirements related issues. Then internally - people can exploit BPEL (which probably is where they want to do this anyway) - while constraining the external effects of this. Again decoupling from WSDL will also greatly reduce the points-of-failure worries - and make for a much cleaner process model. Seems like you've made a start in that direction already - defining the messaging behaviour requirements in a neutral way would solidify this. If the F2F can get closer to providing just one thing: requirements, requirements, and requirements, then I believe we'll have a much easier task ahead of us in unravelling the technology Gordonian Knot that is currently in front of us. Cheers, DW.
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