>b</tt>, or <tt>c</tt> (simple class)</td></tr>
 <tr><td valign="top" headers="construct classes"><tt>[^abc]</tt></td>
     <td headers="matches">Any character except <tt>a</tt>, <tt>b</tt>, or <tt>c</tt> (negation)</td></tr>

 <tr><td valign="top" headers="construct classes"><tt>[a-zA-Z]</tt></td>
     <td headers="matches"><tt>a</tt> through <tt>z</tt>
         or <tt>A</tt> through <tt>Z</tt>, inclusive (range)</td></tr>

 <tr><td valign="top" headers="construct classes"><tt>[a-d[m-p]]</tt></td>
     <td