rfc8198.txt:Akira Kato:wide:japan:13:jul:2017:UNKNOWN:kwd,seccons,ianacons:draft-ietf-dnsop-nsec-aggressiveuse:2004-04-02:2003-08-27:162:0:42:16:220:1:2002-6-24:127:draft-miyakawa-ipv6-prefix-delegation-requirement:2002-11-1:301:2004-06-22:80