[Zope] ZCatalog and XMLDocument problem

This has to do with Amos's article on using XMLDocument at xml.com: http://www.xml.com/pub/1999/12/zope/index.html The example for finding items to catalog doesn't work for me. When I enter getNodeName()=='entry' in the 'expr' field I get the following error: Error Type: NameError Error Value: Eval I'm running Debian GNU/Linux (frozen), Zope 2.1.4, Zcatalog 1.0.0 and XMLDocument 1.0a5. Thanks for any help you can give me on this one. Chris Gray University of Waterloo