[Zope] Load a document in ExternalMethod

Hi, forgive my probably dumm question. I have some ZCatalog search results. I pass the 'data_record_id_' to an ExternalMethod in which I need to load the documtent referenced by the 'data_record_id_' in order to parse it. I tried a few versions of gettitem and getattr, but I've not been successfull. Any merciful help? ;-P Thanks Fabio