David Orchard. <a href="http://www.w3.org/TR/2006/NOTE-soap11-ror-httpbinding-20060321"><cite>SOAP 1.1 Request Optional Response HTTP Binding.</cite></a> 21 March 2006. W3C Note. URL: <a href="http://www.w3.org/TR/2006/NOTE-soap11-ror-httpbinding-20060321">http://www.w3.org/TR/2006/NOTE-soap11-ror-httpbinding-20060321</a>