code: def mktns(self):
          
          tns = self.root.get("targetNamespace")
          tns_prefix = None
          if tns is not None:
              tns_prefix = self.root.findPrefix(tns)
          return tns_prefix, tns
docs: Make the schema's target namespace.
  
          @return: namespace representation of the schema's targetNamespace
              value.
          @rtype: (prefix, URI)