I have developed a flock of Python products that have attributes 'first_date', 'last_date', and 'ok_to_publish' with the intention that these attributes will be set by the content managers. Each product also has an 'isPublishable' method that returns true if 'ok_to_publish' is true _and_ today >= 'first_date' _and_ today <= 'last_date'. This all works fine but I find myself writing DTML in many places to retrieve a list of objects with objectValues() and then looping over them making yet another list of only the objects that are publishable. What I would really like is an objectValues() and an objectIds() that return only publishable objects/ids. It looks like this could be easily accomplished by {tremble} adding an additional parameter to those two routines, say chkPub=None so that I could do a call such as objectValues('Poll',1) when I wanted just the publishable Poll items returned. However... 1. modifying ObjectManager.py doesn't seem like the best move I've ever thought of 2. I'm confused about the ObjectManager internals - can I call my isPublishable methods on objects that ObjectManager keeps in its lists? How? I guess a better question, rather than asking about this one possible solution, would be: How can I extend Zope to give me a list of objects qualified by more than just the meta_type? Guidance gleefully gathered. Thanks! -- Dennis Nichols nichols@tradingconnections.com