Steve Muench; Mark Scardina. <a href="http://www.w3.org/TR/2001/WD-xslt20req-20010214"><cite>XSLT Requirements Version 2.0.</cite></a> 14 February 2001. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2001/WD-xslt20req-20010214">http://www.w3.org/TR/2001/WD-xslt20req-20010214</a>