P 
        method that is employed. In the case of HTTP POST, the procedure call is 
        carried in the body of the HTTP message whereas in the case of HTTP GET, it
        is expressed along the path and query components of the 
        <a href="cvhttp://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2">HTTP Request-URI</a>.</p>
    <p>
        Suppose that a service exposes a procedure named <code>sum</code> that takes two Number parameters,
        as in <code>sum(a, b)</code>, and returns the