David Orchard; Hugo Haas; Hao He. <a href="http://www.w3.org/TR/2004/NOTE-ws-arch-scenarios-20040211"><cite>Web Services Architecture Usage Scenarios.</cite></a> 11 February 2004. W3C Note. URL: <a href="http://www.w3.org/TR/2004/NOTE-ws-arch-scenarios-20040211">http://www.w3.org/TR/2004/NOTE-ws-arch-scenarios-20040211</a>