[Zope-dev] What is the local object in zope?

I am maybe blind, but cannot find a name for the local object in zope (like "this" in JAVA ). The command call expr="subdirectory.manage_addDTMLDocument(....)" works if subdirectory is a folder in the current folder. However the call expr="self.manage_addDTMLDocument(...)" does not work. Could anyone tell me what I am doing wrong? Cheers, Espen