<configure
    xmlns="http://namespaces.zope.org/zope"
    i18n_domain="plone.folder">

    <adapter factory=".default.DefaultOrdering" />
    <adapter factory=".unordered.UnorderedOrdering"
             name="unordered" />
    <adapter factory=".partial.PartialOrdering"
             name="partial" />

</configure>