[1] [CITE@en-us[Tantek's Thoughts]]
([[Tantek Çelik]] 著, [TIME[2009-09-26 13:24:11 +09:00]] 版)
<http://tantek.com/log/2005/06.html#d03t2359>

[2] [CITE[''''''[''''''whatwg'''''']'''''' Extensible microdata attributes]]
( ([TIME[2011-04-28 00:07:52 +09:00]] 版))
<http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2011-April/031343.html>

[3] [CITE[1995 – ''''''[''''''RFE'''''']'''''' metadata attributes not accessible to use]]
( ([TIME[2012-04-28 10:39:42 +09:00]] 版))
<https://bugzilla.mozilla.org/show_bug.cgi?id=1995>