es in which to look for the specified attribute value. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">keyword</code></span></p></td>
<td><p>The keyword of the attribute value to extract. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>The extracted value or a non-empty <code class="computeroutput">value_ref</code> that refers to the value. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>