uirements given above for
          attribute values, a double-quoted attribute value has
          the following restriction:</p>
          <ul>
<li>
<a href="terminology.html#must-requirement" id="must-requirement_xref36">must</a>
            not contain any literal
            "<code title="U+0022 QUOTATION MARK">"</code>"
            characters</li>
          </ul>
<div class="example">
            <p>In the following example, the
            <code>title</code> attribute is
            given with the do