f"In the following, each IRI is followed by the local name and "
                f"optionally its description in parentheses. \n"
                f"The OWL graph supports the following node types:\n"
                f'{", ".join([self._res_to_str(r, "cls") for r in clss])}\n'
                f"The OWL graph supports the following object properties, "
                f"i.e., relationships between objects:\n"
                f'{", ".join([self._res_to_str(r, "op") for r in ops])}\n'
                f"The OWL graph supports the following data properties, "
                f"i.e., relationships between objects and literals:\n"
                f'{", ".join([self._res_to_str(r, "dp") for r in dps])}\n'
            )
        else:
            raise ValueError(f"Mode '{self.standard}' is currently not supported.")