<configure
    xmlns="http://namespaces.zope.org/zope"
    xmlns:browser="http://namespaces.zope.org/browser">

  <browser:page
      name="sitemap.xml.gz"
      for="plone.app.layout.navigation.interfaces.INavigationRoot"
      class=".sitemap.SiteMapView"
      permission="zope2.Public"
     />

</configure>
