pacing="0"
  summary="Regular expression constructs, and what they match">

 <tr align="left">
 <th bgcolor="#CCCCFF" align="left" id="construct">Construct</th>
 <th bgcolor="#CCCCFF" align="left" id="matches">Matches</th>
 </tr>

 <tr><th>&nbsp;</th></tr>
 <tr align="left"><th colspan="2" id="characters">Characters</th></tr>

 <tr><td valign="top" headers="construct characters"><i>x</i></td>
     <td headers="matches">The character <i>x</i></td></tr>
 <tr><td valign="top" headers="construct characters"><tt