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From: Brian Selzer on 10 Apr 2008 23:15

"David Cressey" <cressey73(a)verizon.net> wrote in message
news:e7YKj.6225$Oa2.3255(a)trndny06...
> How does one model behavior?
>

I think it depends on how behavior is defined. Are you trying to model the
behavior of a collection of objects, or the behavior of individual objects.
Addition, for example, could be considered part of the behavior of a
collection of values, since it shows how two values from the collection can
be used to select another (not necessarily distinct) value from the same
collection. For value types, behavior must be limited to the behavior of
the collection, since values are constant. For reference types, on the
other hand, the objects referenced are not necessarily constant, but they
retain their identity despite changes to their composition or appearance.
That which characterizes these changes is the behavior of the individual
objects. It seems to me that one would model the behavior of a collection
of objects quite differently from the behavior of the individual objects.

> It would seem to me that, since conveying behavior from one object to
> another rests on messages, and since messages are made of data, that one
> needs a data model for the messaging system before one begins to come up
> with a bhavior model for a system of collaborating objects.
>
> Or is there another completely different way of setting things up?
>
>


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