[1] [CITE@en-US-x-Hixie[HTML 5.1]]
( ([TIME[2012-12-14 23:17:06 +09:00]] 版))
<http://www.w3.org/TR/2012/WD-html51-20121217/>

[2] [CITE[HTML/W3C-WHATWG-Differences - W3C Wiki]]
( ([TIME[2013-05-04 07:47:24 +09:00]] 版))
<http://www.w3.org/wiki/HTML/W3C-WHATWG-Differences>