Hi, Tino, thanks for answering.
If you only use:
from ZClasses import createZClassForBase createZClassForBase( base_class=YourProduct.HiddenBaseClass, pack=globals() , nice_name='YourHiddenBaseClass', meta_type='YourHiddenClass' ) you can derive from your class in ZClasses, but they dont show up in the add list. << If I get you right, I'd get again ZClasses. But I don't want ZClasses, since it doesn't seem to be possible to get the structure again I had in Zope 2.5.1 (consider a ZClass B _contained_in_, _not_ derived from ZClass A. It's impossible in Zope 2.6 to define that the only objects allowed in ZClass A objects are Bs, because B doesn't show up in the appropriate list). Is there a way to hide python classes, so that they can be added in their particular containing objects only? E.g.: Portal (contains) Layout (contains) Site (contains) Page I know I could throw an exception when the parent object is not of the right type, but that seems to me only the second best solution. -- (sorry for any unfriendly footer added automatically against my wishes... please ignore it!)