<fieldset xmlns="http://www.w3.org/1999/xhtml"
     xmlns:py="http://genshi.edgewall.org/"
     xmlns:xi="http://www.w3.org/2001/XInclude">
  <xi:include href="_ew_lib.html" />
  <legend py:if="label">$label</legend>
  ${subfields(hidden_fields, fields)}
</fieldset>
