Norman Walsh. <a href="http://www.w3.org/TR/1998/WD-XSLReq-19980511"><cite>XSL Requirements Summary.</cite></a> 11 May 1998. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/1998/WD-XSLReq-19980511">http://www.w3.org/TR/1998/WD-XSLReq-19980511</a>