We've installed Kavio's CatalogQuery product and are very happy with it. Haven't looked at the ZOQLMethod from iuveno yet, but both look like great steps in the right direction.

Thanks. I actually need to look at Casey's code and see what I can reuse. The efficiency of my version is not that great yet, but much more flexible. So I want to take Casey's code and optimize mine a little. BTW, I just added a mailing list and a poll for ZOQL. Please go to http://demo.iuveno-net.de/iuveno/Products/ZOQLMethod and vote in the poll, so I can get an estimate of the general interest.

I have one question: is it possible using a normal catalog query or Kavio's catalog query to check if a value is not set? The representation returned is Missing.Value, but I seem to be unable to say, e.g, 'Description == Missing.Value' etc. How hard is it to add such functionality?

You mean, whether the system checks, if a property exists at all or is set to None? I think both would be no problem. 1. Property exists or not: I could support a function, like: exists(Property) Example: SELECT * FROM Test WHERE exists(Property); 2. Property is set to None: Simply use equal: Property == None Note: That might work already? I have to check... Example: SELECT * FROM Test WHERE Property == None; Regards, Stephan -- Stephan Richter CBU - Physics and Chemistry Student Web2k - Web Design/Development & Technical Project Management