         <li>a
            "<code title="U+0027 APOSTROPHE">'</code>"
            character.</li>
          </ol>
<p>In addition to the general requirements given above
          for attribute values, a single-quoted attribute value
          has the following restriction:</p>
          <ul>
<li>
<a href="terminology.html#must-requirement" id="must-requirement_xref35">must</a>
            not contain any literal
            "<code title="U+0027 APOSTROPHE">'</code>"
            characters</li>
          </u