[1] draft-eastlake-uri-fqdn-param-00 - Considerations for URI and FQDN Protocol Parameters ( (2011-05-30 21:02:06 +09:00 版)) http://tools.ietf.org/html/draft-eastlake-uri-fqdn-param-00

[2] RFC 3172 - Management Guidelines & Operational Requirements for the Address and Routing Parameter Area Domain ("arpa") (2017-04-16 16:12:25 +09:00) https://tools.ietf.org/html/rfc3172