David Orchard; Eve Maler; Steven DeRose. <a href="http://www.w3.org/TR/2001/REC-xlink-20010627"><cite>XML Linking Language (XLink) Version 1.0.</cite></a> 27 June 2001. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2001/REC-xlink-20010627">http://www.w3.org/TR/2001/REC-xlink-20010627</a>