tifier">isxdigit</span></code>
                  in the current character set
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">lower</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Ch</span></code>
                </p>
              </td>
<td>
                <p>
                  Matches a character based 