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Subject: Re: [ws-caf-editors] comment question
Mark Little wrote: First of all, we can go with whatever the consensus is. But I have to disagree on a point. First let me make a statement: i is a degenerate case of ii. Once that's established, then you don't loose anything, but you gain the ability to use the context structure in new and interesting ways. For example, you can exploit it in place of headers that might benefit from the pass by reference capabilities, but do not require any kind of activity model. While I understand what you're saying, let me switch gears again: I think Eric's point is a bit more subtle -- and independent of this issue of decomposability; if you read the model text, activities and contexts are more or less intertwined. He asks specifically about the execution embodying the semantic. And I'm asking if we have a chicken or the egg problem here -- to which there's no universal answer. One could say "God created a chicken" or "Evolution started in the egg", and both are starting points that some set of people might agree on. In some sense we need to pick our position. The second implication is that the context viewed at a point in time tells us about the state of the activity. This is particularly hard for me because the context only reveals itself on the boundaries of execution -- not at all on responses that don't exist, as in oneway operations, and becomes even more complicated for parallelized executions. Which is why I tend to think at best the context can have associative properties, but no absolute view of the state of the world. The reaction I get on the spec is that 1) it sounds important and invariably 2) it's hard to understand. Most of the confusion comes from the fact that there's alot of concepts. I was hoping that the concepts could be isolated to some extent in the presentation -- particularly if they had independent use cases to support them.
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