Dr. Anthony Monta writes:

... what's the DTML for making these objects auto-delete after x number of days? Zope objects are not active in its own. They must be operated on and will not auto-delete themselves after some period.

You may look at Xron, a Zope product implementing a scheduler (--> zope.org). It would allow you to schedule events and trigger event specific actions. The action could search all objects via ZCatalog sufficiently old and delete them. Dieter