&nbsp;</td>
          <td> const</td>
        </tr>
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<p>
If nillable is true, then an element may also be valid if it carries the namespace qualified attribute with local name <code>nil</code> from namespace <code><a href="http://www.w3.org/2001/XMLSchema-instance">http://www.w3.org/2001/XMLSchema-instance</a></code> and value <code>true</code> (xsi:nil) even if it has no text or element content despite a <code>content type</code> which would otherwise require cont