code: def _getLiteralXSDType(self, literal):
          
          if isinstance(literal, int):
              return self._getnode("xsd:integer")
          if isinstance(literal, float):
              return self._getnode("xsd:double")
docs: This could be much more nuanced, but for now
          if a literal is not a str, determine if it's
          a xsd int or double
          :param literal:
          :return: str - xsd full iri