derstand by
          providing a reference on the meaning of the symbols used. If present, the
          symbol name must be the second field.</p>
          <p>The &quot;<span class="pdat">name</span>&quot; follows the rules of
          <a href="#qstr">quoted text</a>.</p>
        </div>
        <h5>color</h5>
        <div class="indent">
          <p>The symbol <span class="pdat">color</span> is optional and
          represented by a 6 digit hexadecimal number with
          digits 1 &amp; 2 defining th