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

    <!-- Let any Archetypes content type be extensible -->
    <class class="Products.Archetypes.BaseContent.BaseContent">
        <implements interface=".interfaces.IExtensible" />
    </class>

    <class class="Products.Archetypes.BaseFolder.BaseFolder">
        <implements interface=".interfaces.IExtensible" />
    </class>

</configure>
