[Zope] How to stuff a tree from a SQL query?

As posted the other day, I'd like to create a (multilevel) tree from the results of a SQL query. With insightful input from Hannu, I've simplified my db design to something more useful. I have, among other fields, a node_id and a parent_id. This should be sufficient to create a tree of "one way linked lists" as I remember them from class. Now my question is: How do I stuff the results from the SQL query into the tree? Stuffing files and folders into a tree is no problem. -- Best regards / Mvh., Steen Suder Linux Systems Administrator Use "sfs @T sciatl DOD dk" for email