[Zope-dev] How to get Entrys from a catalog by date boundaries

Hi, I've tried to select all entrys from a catalog by defining the date boundaries(Python script). Looks like this: id=context.getId() return context.cata( {'content' : id, 'date': [datestart, dateend], 'date_usage' : 'range:min:max', } ) cata = my catalog,datestart =start date(date-string),dateend=end date When I send my request, the only things I get back are some <MYBRAnI instance at #123848>-tags. For the beginning i would just like to get the ids of the items in the boundaries. How can i achieve that? Please help !! Sebastian