[Zope] "creating XML Applications With Zope"

In Amos Latteier's "creating XML Applications With Zope" at http://www.xml.com/pub/1999/12/zope/index.html There is an example that uses a Zcatalog. He says to enter this into the expr field of the "Find Items to Zcatalog": getNodeName()=='entry' and click find. When I do this with my own version, or even his version Zope gets this error: Zope has encountered an error while publishing this resource. Error Type: NameError Error Value: Eval it has to do with that entry in expr. Is that a typo?