code: def document(self, wrapper):
          
          tag = wrapper[1].name
          ns = wrapper[1].namespace("ns0")
          return Element(tag, ns=ns)
docs: Get the document root. For I{document/literal}, this is the name of the
          wrapper element qualified by the schema's target namespace.
  
          @param wrapper: The method name.
          @type wrapper: L{xsd.sxbase.SchemaObject}
          @return: A root element.
          @rtype: L{Element}