You need to derive EmployX from DataSkin and some Zope persistent class such as SimpleItem. Otherwise, it won't be persistent.
Accualy I don´t have to do that.
Looking more closely at DataSkins.py, I see that class DataSkin derives from Persistent.
So, I was wrong -- please ignore what I said about needing to derive from Persistent :-)
Whoooha! I added PropertyManager to EmployX and it saves properties? Is this correct? - The objects are stored presistently in the Racks storage (BTree). - The attributes (and the propertysheet which is a attribute) are managed by the "PersistentAttributes" attribute provider. (Can I verify this by some kind of inspection?) - If I would create Attribute Providers (with SkinScripts) they could redirect the storage to what ever storage i like. Hm, I realize that I'm still very confused and the only way out of that is "doing stuff" and see what happens. Johanc PS. I uploaded the latest version of EmployX if anybody want to have a look. Its working now and should do basicly the same thing EmployZ does (except minor cahnges). http://www.zope.org/Members/johanc/EmployX