ly to the entire archive, not
    only the files you've added while updating.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">keepcompression</td>
    <td valign="top">For entries coming from existing archives (like
    nested <em>zipfileset</em>s or while updating the archive), keep
    the compression as it has been originally instead of using the
    <em>compress</em> attribute.  Defaults false.  <em>Since Ant
    1.6</em></td>
    <td align="center" valign="top">No</