Stephen M. Watt; Max Froumentin; Yi-Min Chee. <a href="http://www.w3.org/TR/2006/WD-InkML-20061023"><cite>Ink Markup Language (InkML).</cite></a> 23 October 2006. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2006/WD-InkML-20061023">http://www.w3.org/TR/2006/WD-InkML-20061023</a>