* 仕様書

[REFS[
- [1] [CITE@en-US[XBL 2.0]] ([TIME[2010-09-03 10:10:02 +09:00]] 版) <http://dev.w3.org/2006/xbl2/Overview.html#the-bound-element-pseudo-class>
- [2] [CITE@en-US[Behavioral Extensions to CSS]] ([TIME[2010-09-03 10:05:52 +09:00]] 版) <http://dev.w3.org/2006/xbl2/css-module.html#the-bound-element-pseudo-class>
]REFS]