[Zope] Add "type > myzClass" does not have a property for title?

Have I missed something? Or is "title" completely missing when you add a zClass object? It only asks for the ID. I have had to add "title" manually to the "property sheets" to compensate for this. If I am not mistaken, This seems like a major ommission and Zope inconsistency with zClasses which are supposed to be Folder-like. The Zope Book "Chapter 9" says to create a "title" index in a zCatalog, but the zClass doesn't have a "title" property...? Thanks for any clarification on this, -Trevor