[1] [CITE@en-GB-hixie[Web Controls 1.0]]
([TIME[2004-11-09 08:49:52 +09:00]] 版)
<http://www.whatwg.org/specs/web-controls/current-work/#user-modify>

[2] [CITE[User Interface Enhancements]]
( ([TIME[1999-09-16 05:07:02 +09:00]] 版))
<http://www.w3.org/TR/1999/WD-css3-userint-19990916#user-modify>

[3] [CITE@en[User Interface for CSS3]]
( ([TIME[2000-06-23 03:09:21 +09:00]] 版))
<http://www.w3.org/TR/2000/WD-css3-userint-20000216#user-modify>