[1] draft-eastlake-uri-fqdn-param-00 - Considerations for URI and FQDN Protocol Parameters ( ( 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") () <https://tools.ietf.org/html/rfc3172>