Johan Hjelm; Mikael Nilsson; Hidetaka Ohto. <a href="http://www.w3.org/TR/2000/WD-CCPP-ra-20000721"><cite>Composite Capabilities/Preference Profiles: Requirements and Architecture.</cite></a> 21 July 2000. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2000/WD-CCPP-ra-20000721">http://www.w3.org/TR/2000/WD-CCPP-ra-20000721</a>