class files by <a
      href="../using.html#references">reference</a> to a PATH defined elsewhere.</td>
    <td align="center" valign="top">all</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">bootclasspathref</td>
    <td valign="top">Override location of class files loaded by the
      bootstrap class loader by <a href="../using.html#references">reference</a> to a
      PATH defined elsewhere.</td>
    <td align="center" valign="top">all</td>
    <td align="center" vali