Mark Bartel; John Boyer; Pratik Datta et al.  <a href="http://www.w3.org/TR/2010/WD-xmldsig-core2-20100304"><cite>XML Signature Syntax and Processing Version 2.0</cite></a>, 4 March 2010. W3C Working Draft. URL: <a href="http://www.w3.org/TR/xmldsig-core2/">http://www.w3.org/TR/xmldsig-core2/</a>