@abc.abstractmethod<EOL><INDENT>def get_catalog_search_order(self):<DEDENT>
return<EOL>
Gets a subject search order.

        The ``CatalogSearchOrder`` is supplied to a ``CatalogSearch`` to
        specify the ordering of results.

        :return: the catalog search order
        :rtype: ``osid.cataloging.CatalogSearchOrder``


        *compliance: mandatory -- This method must be implemented.*