@property<EOL><INDENT>def oaiset(self):<DEDENT>
if current_app.config['<STR_LIT>']:<EOL><INDENT>from invenio_oaiserver.models import OAISet<EOL>return OAISet.query.filter_by(spec=self.oaiset_spec).one()<EOL><DEDENT>else:<EOL><INDENT>return None<EOL><DEDENT>
Return the corresponding OAISet for given community.

        If OAIServer is not installed this property will return None.

        :returns: returns OAISet object corresponding to this community.
        :rtype: `invenio_oaiserver.models.OAISet` or None