> ...
> When you're thinking about a system, it is often helpful to think about
> just a part of the system rather than the system as a whole. To do this, 
> you define a limited "scope" around a particular subsystem.
> In this case, an Actor represents the role something from outside your
> subsystem plays when interacting with something inside your subsystem.
> 
> The "something" can be an object, a person, a separate computer system,
> a corporation...
> 

Thanks Steve,
You cleared up my confusion.
 
> > How should I look at roles in ZPatterns?
> 
> This is all standard object-oriented stuff, and is not specific to ZPatterns.
> Get the Coad book, read it, and things should get clearer :-)

It's on my ToReadList :-)
 

> Also, the Catalysis method puts an emphasis on defining interactions and 
> collaborations between objects in terms of roles. You might want to take
> a look at that.

Is Catalysis method a pattern in Coads book?

Regards,
Johan Carlsson


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