Check out BTreeFolder2; install it and read its source briefly, you'll get what you need http://cvs.zope.org/Products/BTreeFolder2/. Sean -----Original Message----- From: Daniël Hooymans [mailto:d.hooymans@edufocus.nl] Sent: Thursday, December 19, 2002 7:45 AM To: zope@zope.org Subject: [Zope] idea for unique object id's Hi all, Is it an idea to make a Folderish class which will generate a unique id when an object is added to it. Perhaps anyone has already done something like this? Greetz, Daniel