[1] RFC 5988 - Web Linking ( (2012-03-22 09:19:11 +09:00 版)) <http://tools.ietf.org/html/rfc5988#page-16>

[2] IRC logs: freenode / #whatwg / 20130306 ( (2013-03-18 20:29:40 +09:00 版)) <http://krijnhoetmer.nl/irc-logs/whatwg/20130306#l-72>

[3] Web Applications 1.0 r8316 Move away from angle brackets and towards proper Unicode characters, since Unicode font support is widespread now. ( (2013-11-27 08:03:00 +09:00 版)) <http://html5.org/tools/web-apps-tracker?from=8315&to=8316>