[1] Web Controls 1.0 ( 版) <http://www.whatwg.org/specs/web-controls/current-work/#key-handling>
[2] IRC logs: freenode / #whatwg / 20090910 ( 版) <http://krijnhoetmer.nl/irc-logs/whatwg/20090910#l-313>
[3] User Interface Enhancements ( ( 版)) <http://www.w3.org/TR/1999/WD-css3-userint-19990916#key-equivalent>
[4] User Interface for CSS3 ( ( 版)) <http://www.w3.org/TR/2000/WD-css3-userint-20000216#key-equivalent>
[5] CSS3 module: Basic User Interface ( (Tantek Çelik 著, 版)) <http://www.w3.org/TR/2002/WD-css3-ui-20020802/#key-equivalent>
[6] CSS3 Basic User Interface Module ( (Tantek Çelik 著, 版)) <http://www.w3.org/TR/2003/WD-css3-ui-20030703/#key-equivalent>
[7] Web Controls 1.0 ( ( 版)) <http://www.whatwg.org/specs/web-controls/current-work/#key-handling>
[8] Web Applications Markup Language 1.0 ( ( 版)) <http://hixie.ch/specs/html/apps/web-apps-1#key-handling>