Jonathan Robie; Don Chamberlin. <a href="http://www.w3.org/TR/2008/CR-xquery-update-10-requirements-20080314"><cite>XQuery Update Facility 1.0 Requirements.</cite></a> 14 March 2008. W3C Candidate Recommendation. (Work in progress.) URL: <a href="http://www.w3.org/TR/2008/CR-xquery-update-10-requirements-20080314">http://www.w3.org/TR/2008/CR-xquery-update-10-requirements-20080314</a>