it contains
     <a href="terminology.html#must-requirement" id="must-requirement_xref56">must</a>
     be
     <a href="syntax.html#normal-character-data" id="normal-character-data_xref5">normal character data</a>.</li>
   </ul>
</div>
 <div id="cdata-sections" class="section">
   <h2>4.9. CDATA sections in SVG and MathML contents <a class="hash" href="#cdata-sections">#</a> <a class="toc-bak" href="Overview.html#cdata-sections-toc">T</a>
</h2>
   <p>
   <dfn id="syntax-cdata-sections" title="syntax-cdata-