[1] [CITE@en[(X)HTML5 Tracking]]
([TIME[2009-09-07 08:00:12 +09:00]] 版)
<http://html5.org/tools/web-apps-tracker?from=3377&to=3378>

[2] [CITE@en[Obsolete but conforming features]]
<http://www.whatwg.org/specs/web-apps/current-work/#obsolete-but-conforming-features>