[Zope] How can folder address its contents?

I want to iterate over the contents of a folder. I can't do it by name, since items will be added and taken out of the folder at run time, so I don't know what they'll be called. I think I'll figure out the iteration ok, but how do I get at the objects contained in a folder, other than by name? -- . . . . . . . . . . . . . . . . . . Bob Erb . . I don't want to die today!