G'day, I was toying with a few ideas, and discovered that I can actually store in a persistent manner references to other persistent objects !! I for instance have a persistent object that has, as an attribute, a reference to another persistent object (Done using Python's standard shallow copying: self.attribute = object). I use this in a scenario much like DB connections/ZSQL Methods, where the ZSQL MEthod would have a stored persistent reference to it's connection object. This is nice because it allows to point to an object without using paths and traversal (So it's quick and dirty), and the reference is maintained through a rename. I can see some problems related to security, such as if traversal is not used, then some security can be by-passed ... In my few years of using Zope I've never heard of any one using this ... Has anybody ? What are the official pro's and con's ? Thanks, Jean-François Doyon Internet Service Development and Systems Support / Développement des services et soutien de systèmes Internet GeoAccess Division / Division GéoAccès Canada Center for Remote Sensing / Centre canadien de télédétection Natural Resources Canada / Ressources naturelles Canada http://atlas.gc.ca Phone: (613) 992-4902 Fax: (613) 947-2410