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<html>
  <head>
    <title>Patterns</title>
  </head>
  <body>
    <p>Hello to:
      <ul nevow:data="group_names" nevow:render="sequence">
        <span nevow:pattern="divider"><br /></span>
        <li nevow:pattern="header">--------------</li>
        <li nevow:pattern="footer">--------------</li>
	<li nevow:pattern="item" nevow:render="string" />
      </ul>
    </p>
  </body>
</html>

class Page(rend.Page):
    docFactory = loaders.htmlfile('hellohtml.html')
    ctr = 0
    def data_group_names (self, context, data):
	return ["Chipy", "BayPIGgies", "boston-pig", "ZPUG"]
yields ...