<dfn id="syntax-charref">character references</dfn> are a form
    of markup for representing single individual characters. There
    are three types of character references:</p>
    <ul>
<li><a href="syntax.html#named-charref" id="named-charref_xref1">named character references</a></li>
      <li><a href="syntax.html#dec-charref" id="dec-charref_xref1">decimal numeric character references</a></li>
      <li><a href="syntax.html#hex-charref" id="hex-charref_xref1">hexadecimal numeric character references</a