[Zope] how to read the source of LocalFS-File-Object

Dear list, I try to read the source of a xml-File in a LocalFS-Folder on a win98 PC. With: object = sourcePath['folderA']['folderB']['file.xml'] source = object.document_src() I get the content of the 'file.xml' but without the xml-tags which I need. I would like to get the same content with the tags that I see in the text-area when I click on 'file.xml' link in the ZMI-screen in the LocalFS Folders. I could not find how to get this myself. It must be related to the manage_workspace and the getattr methods but all my effords did not work. so some hint would be great. Thanks, Elena