[Zope] Catalog and greater then less than

Zopists, Isthere a way to search for a value in the Ctalog that is greater than/less then a given value (Especially dates) <> don't work and so I guess its not regular expression syntax. The only mention of greater than in the docs is ceil(X), and that's not quite it. Any suggestions apprecreciated. BTW, my tremendous application is running to it's feet and I have to thank the all of you who have helped me from the list, Kevin, Michel, Martjin, and others. You are what Open Source is about. All my best, -- Jason Spisak webmaster@hiretechs.com