Hi Stef, I think that the inclusion of DisplayableObject or something like that will not help in better system design. The only thing that should really know about how to generate forms for icons, should be the UI framework. Imagine that we will want to use something like GTK framework with vector icons. The model classes should ideally never produce icons themselves. We should have maybe some class, an icon description. In the standard case, it will only hold the selector for the icon, but then it may add some additional data (like information about the small progress bar embedded in the icon). In the worst case it could provide as an additional property the form for the icon but then it will limit to use such thing effectively with other UI frameworks (like HTML rendering). If we will add a DisplayableObject, we will only make easier to make models that are not strictly separated from the UI. Cheers, -- Pavel