[1] [CITE[IRC logs: freenode / #whatwg / 20090814]]
([TIME[2009-10-11 01:23:39 +09:00]] 版)
<http://krijnhoetmer.nl/irc-logs/whatwg/20090814#l-565>

[2] [CITE@en[(X)HTML5 Tracking]]
([TIME[2009-10-23 23:17:47 +09:00]] 版)
<http://html5.org/tools/web-apps-tracker?from=4275&to=4276>

[3] [CITE@en[(X)HTML5 Tracking]]
([TIME[2010-01-05 10:50:33 +09:00]] 版)
<http://html5.org/tools/web-apps-tracker?from=4460&to=4461>

[4] [CITE[''''''[''''''whatwg'''''']'''''' metadata attribute for media]]
( ([TIME[2012-12-12 00:58:48 +09:00]] 版))
<http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2012-December/038315.html>