[1] XHTML 1.2 - Implements Attribute Module ( 版) <http://www.w3.org/MarkUp/2008/ED-xhtml12-20081223/implements.html#a_implements>
[2] Why no script implements - WHATWG Wiki ( ( 版)) <http://wiki.whatwg.org/wiki/Why_no_script_implements>
[25] XML Events 2 ( ( 版)) <http://www.w3.org/TR/xml-events2/#attr-script-implements>