[1] [CITE@en[Fetching contexts]]
( ([[Anne van Kesteren]] 著, [TIME[2013-06-06 23:11:25 +09:00]] 版))
<http://lists.w3.org/Archives/Public/public-webappsec/2013Jun/0027.html>

[2] [CITE@en[Contexts - WHATWG Wiki]]
( ([TIME[2013-06-06 04:24:53 +09:00]] 版))
<http://wiki.whatwg.org/wiki/Contexts>