Martin Gudgin; et al. <a href="http://www.w3.org/TR/2005/REC-xop10-20050125"><cite>XML-binary Optimized Packaging.</cite></a> 25 January 2005. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2005/REC-xop10-20050125">http://www.w3.org/TR/2005/REC-xop10-20050125</a>