Chimezie Ogbuji. <a href="http://www.w3.org/TR/2007/REC-grddl-tests-20070911"><cite>GRDDL Test Cases.</cite></a> 11 September 2007. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2007/REC-grddl-tests-20070911">http://www.w3.org/TR/2007/REC-grddl-tests-20070911</a>