Steven J. DeRose. <a href="http://www.w3.org/TR/1999/NOTE-xptr-infoset-liaison-19990224"><cite>XPointer-Information Set Liaison Statement Version 1.0.</cite></a> 24 February 1999. W3C Note. URL: <a href="http://www.w3.org/TR/1999/NOTE-xptr-infoset-liaison-19990224">http://www.w3.org/TR/1999/NOTE-xptr-infoset-liaison-19990224</a>