the renderer:

    def servers(self, req, tag):
        servers = list(self.store.query(settings.Host))
        return page.sequence(
            tag, [ServerInfoElement(s) for s in servers])
    renderer(servers)


the template;

  <table nevow:render="servers">
    <tr nevow:pattern="header">
      <td>
        <div class="overview-header">Servers</div>
      </td>
    </tr>
    <tr nevow:pattern="item">
      <td>
        <div nevow:render="data" />
      </td>
    </tr>
    <tr nevow:pattern="footer">
      <td align="right">
        <a href="#">Add new server...</a>
      </td>
    </tr>
  </table>