"special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm38325"></a><h2>Description</h2>
<p>The function extracts an attribute value from the view. The user has to explicitly specify the type or set of possible types of the attribute value to be visited.</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</t