Ian Hickson. <a href="http://www.w3.org/TR/2007/CR-xbl-20070316"><cite>XML Binding Language (XBL) 2.0.</cite></a> 16 March 2007. W3C Candidate Recommendation. (Work in progress.) URL: <a href="http://www.w3.org/TR/2007/CR-xbl-20070316">http://www.w3.org/TR/2007/CR-xbl-20070316</a>