Re: links & messages



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Andy Evans (andye@cs.york.ac.uk)
Thu, 20 Jan 2000 11:24:29 -0000


Hi all, > >i feel the culprit in this case (and many others) is the seductive idea (that we all secretly would like to belive): that there can be some single end-to-end object model to cover a project from tackling the problem through deploying the solution. > Well I'm not sure I agree with this. Again, and again, I see people confused with levels of abstraction and modelling semantics. At the most basic level, we model systems using objects and links. Whether these objects represent byte code or highly abstract concepts, or links represent instances of associations, aggregations or class attributes, they are just being as modelling abstractions. Sometimes our models have certain patterns of configurations that we want to keep re-using because they are useful abstractions, e.g. associations. However, at the most fundamental level, they just represent constraints on the valid configurations of objects and links permited by the abstraction we have created. Andy


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