[1] [CITE[IRC logs: freenode / #whatwg / 20090512]]
([TIME[2009-08-09 09:27:08 +09:00]] 版)
<http://krijnhoetmer.nl/irc-logs/whatwg/20090512>

[2] [CITE@en[Web Applications 1.0 r6851  When itemprop='' is specified on elements like <a> or <iframe>, require the corresponding attribute, to help authors who are misusing microdata.Affected topics: HTML, Microdata, Video and Audio]]
( ([TIME[2011-12-07 09:35:00 +09:00]] 版))
<http://html5.org/tools/web-apps-tracker?from=6850&to=6851>