I've written another design document regarding a new technique I've been using to develop ZClasses... It's somewhat related to the discussion you've been having on the Zope-PTK list but its a little bit off-tangent from your discussion. I've focused on a "related" problem of integrating lists of heterogenous objects returned by searchable functions and being able to customize their rendering while at the same time not being tightly coupled to these objects returned... (if my explanation is somewhat fuzzy, try reading the article I wrote -- I'd appreciate your comments...) The URL is here: http://squishdot.org/948790303/index_html Regards, Butch __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com