"Service.html" title="Service requirements">service</a>,
        as well as the requirements listed below.
      </p>
<p>
        In the table below, <code class="computeroutput"><span class="identifier">X</span></code> denotes
        an I/O object service class, <code class="computeroutput"><span class="identifier">a</span></code>
        and <code class="computeroutput"><span class="identifier">ao</span></code> denote values of type
        <code class="computeroutput"><span class="identifier">X</span></