[1] XBL 2.0 ( ( 版)) http://dev.w3.org/2006/xbl2/Overview.html#binding
[2] XML Binding Language (XBL) 2.0 ( ( 版)) http://www.w3.org/TR/2007/CR-xbl-20070316/#binding14
[3] XML Binding Language (XBL) 2.0 ( ( 版)) http://www.w3.org/TR/2007/CR-xbl-20070316/#binding
[4] XBL 2.0, , https://web.archive.org/web/20120306233919/http://dev.w3.org/2006/xbl2/Overview.html#binding0