[1] [CITE[IRC logs: freenode / #whatwg / 20090817]]
([TIME[2009-10-11 15:59:52 +09:00]] 版)
<http://krijnhoetmer.nl/irc-logs/whatwg/20090817#l-1015>

[2] [CITE@en[Web Applications 1.0 r5735 Remove UndoManager from W3C HTML5 spec since it's not really fully baked yet.]]
( ([TIME[2011-01-01 15:20:00 +09:00]] 版))
<http://html5.org/tools/web-apps-tracker?from=5734&to=5735>