tain <a href="syntax.html#syntax-charref" id="syntax-charref_xref5">character references</a>
</li>
          <li>
<a href="terminology.html#must-requirement" id="must-requirement_xref47">must</a>
          not contain any occurrences of the string
          "<code title="U+003C LESS-THAN SIGN, U+002F SOLIDUS">&lt;/</code>",
          followed by characters that are a
          <a href="terminology.html#case-insensitive" id="case-insensitive_xref14">case-insensitive match</a>
          for the tag name of th