[1] [CITE@en[323938 – xpath support for anonymous nodes]]
( ([TIME[2013-11-01 00:00:27 +09:00]] 版))
<https://bugzilla.mozilla.org/show_bug.cgi?id=323938>

[2] [CITE@en-US[XML Binding Language (XBL) 2.0]]
( ([TIME[2007-03-16 22:20:16 +09:00]] 版))
<http://www.w3.org/TR/2007/CR-xbl-20070316/#shadow7>