mantics
                  </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                  <p>
                    Extractor
                  </p>
                </td>
<td>
                  <p>
                    a model of <a class="link" href="../concepts/extractor.html" title="Extractor"><code class="computeroutput"><span class="identifier">Extractor</span></code></a>
                    whose execute function returns a reference type.
                  </p>
                </td>
<td>
   