[Zope-dev] Meta-Types

Hi, i have a question on using meta_types in my Product. My Product contains some classes that are Folder, each Folder has different meta_types. One of these Folder(Folder4) can be added everywhere. These Folder should contain only the meta_types of the Parent Folder in which he was created. Folder1(mt='a','b') Folder4(mt='a','b') Folder2(mt='a','c') Folder4(mt='a','c') Folder3(mt='e','f') Folder4(mt='e','f') Does anyone understand what i mean and can anyone help me?