[Zope] problem with querying a catalog

Hi, I have some trouble querying a catalog. This DTML works. It get's only the edf objects in the path. <dtml-in expr="dfcatalog(meta_type='edf', path='/avin/literatuur/antroposofische_literatuur/artikelendatabase/ms')"> <a href="&dtml-absolute_url;"><dtml-var title></a> </dtml-in> This Python script doesn't work. It returns ALL the edf objects on the site. zcat=container.dfcatalog results=zcat({'query' : '/avin/literatuur/antroposofische_literatuur/artikelendatabase/ms','meta_typ e':'edf'}) Thoughts? Henny