def get_resource_relationship_query(self):
raise errors.Unimplemented()<EOL>
Gets the query for aa resource relationship.

        Multiple retrievals produce a nested ``OR`` term.

        return: (osid.resource.ResourceRelationshipQuery) - the resource
                relationship query
        raise:  Unimplemented -
                ``supports_resource_relationship_query()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_resource_relationship_query()`` is ``true``.*