@abc.abstractmethod<EOL><INDENT>def get_repository_query(self):<DEDENT>
return<EOL>
Gets the query for a repository.

        Multiple queries can be retrieved for a nested ``OR`` term.

        :return: the repository query
        :rtype: ``osid.repository.RepositoryQuery``
        :raise: ``Unimplemented`` -- ``supports_repository_query()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_repository_query()`` is ``true``.*