PawsRadioButtonGroup
<widget
  name = qname
  factory = "pawsRadioButtonGroup"
  widget-attributes>
  <!-- Content: (widget[@factory='pawsRadioButton']*,
                 radio?, widget-elements) -->
</widget>
The pawsRadioButtonGroup factory is used to create a group of radio buttons.  It acts as its own widget, so you really need a <frame /> element here or else you won't be able to see anything.