sallowed</em>&nbsp;</td><td>{ <code>DERIVATION_SUBSTITUTION, DERIVATION_EXTENSION, DERIVATION_RESTRICTION</code> } or <code>DERIVATION_NONE</code>. Represents a block set for the element. </td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>True if <code>disallowed</code> is a part of the substitution group exclusion subset. </dd></dl>

</div>
</div><p>
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