bol table, <code class="computeroutput"><span class="identifier">sym</span></code>.
                      If attribute is found in the symbol table, the corresponding
                      value is emitted. If <code class="computeroutput"><span class="identifier">sym</span></code>
                      does not store values, the original attribute is emitted.
                    </p>
                  </td>
</tr>
</tbody>
</table></div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/