Hello....

>Diego,
>
>Views need models. Models do _not_ need views (at least that's the
>theory).

I'm not sure that model do not need views... if an object is not observed 
by anyone the object will die...

>Thus if the last reference to a view goes away that view should
>go away without bothering the programmer to manually deregister.

Here the definition of "last reference" is not clear to me.... I can 
consider that the last reference comes from the model....

>It appears to me that if the model needs your "views" then these no views
>but something different.

My problem appears because the dependents mechanism assume that you must 
have other strong-reference to a view to work.... in most of the cases this 
extra strong reference is the World... in my case this extra 
strong-reference is in other image.

 From my point of view, one object can observe other object without the 
needing of a third one.

>And you may not expect the mechanism which was
>designed for views to work with it.

I think that you assume that view means gui-view....

>Cheers,
>   - Andreas

Thanks for your answer,

Diego Gomez Deck