selectFields = sys_category.uid as catUid, sys_category.title as cattitle
join = sys_category_record_mm ON pages.uid = sys_category_record_mm.uid_foreign JOIN sys_category ON sys_category.uid = sys_category_record_mm.uid_local
where = sys_category_record_mm.tablenames = 'pages' AND sys_category.sys_language_uid = '{GP:L}' AND sys_category_record_mm.uid_foreign = {register:pageUid} AND sys_category.parent = {register:parentCat}