def GetNSAndWsdlname(self, tag):
      """ Map prefix:name tag into ns, name """
      idx = tag.find(":")
      if idx >= 0:
         prefix, name = tag[:idx], tag[idx + 1:]
      else:
         prefix, name = None, tag
      # Map prefix to ns
      ns = self._GetNamespaceFromPrefix(prefix)
      return ns, name