+ raw_id_fields = ('index_page', 'event_detail_page', 'timespan_page', 'tag_page', 'location_page', 'owner_page', 'location_archive_page', 'tag_archive_page', 'owner_archive_page', 'item_title_template', 'item_description_template',)
+ related_lookup_fields = {'fk': raw_id_fields}