Rhys Lewis; Roland Merrick. <a href="http://www.w3.org/TR/2007/CR-cselection-xaf-20070725"><cite>Delivery Context: XPath Access Functions 1.0.</cite></a> 25 July 2007. W3C Candidate Recommendation. (Work in progress.) URL: <a href="http://www.w3.org/TR/2007/CR-cselection-xaf-20070725">http://www.w3.org/TR/2007/CR-cselection-xaf-20070725</a>