This is an interesting question.
The main reason I see for this is the fact that none of those meta- 
model were by default in Squeak. Each of the author started to make  
its own, for the understandable will to be self-contain without  
relying on external libraries...

Alexandre


On 8 May 2007, at 11:17, Mathieu Suen wrote:

> Hi,
>
> With Damien we are looking at the RefactoringEngine and after a  
> while we are wondering how come we had so many metamodel.
> Is there any reason to have RBClass RBMethod and so one.
>
> We also have the same things for OmniBrowser: OBMethodNode  
> OBClassNode ...
> Is there any particular design reason?
>
> 	Mth
>
>
>
>

-- 
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Alexandre Bergel  http://www.software-artist.eu
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