ZCML File
groupfolder.zcml

<configure
    xmlns="http://namespaces.zope.org/browser"
    i18n_domain="zope"
    >
<editform
    name="edit.html"
    schema="..groupfolder.IGroupInformation"
    permission="zope.ManageServices"
    label="Change group information"
    menu="zmi_views"
    title="Edit"
    />
<addform
    name="AddGroupInformation.html"
    schema="..groupfolder.IGroupInformation"
    permission="zope.ManageServices"
    label="Add group information"
    fields="title description"
    content_factory="..groupfolder.GroupInformation"
    />
<addMenuItem
    title="Group"
    description="A principals group"
    permission="zope.ManageServices"
    class="..groupfolder.GroupInformation"
    view="AddGroupInformation.html"
    />
<addform
    name="AddGroupFolder.html"
    schema="..groupfolder.IGroupFolder"
    permission="zope.ManageServices"
    label="Add group folder"
    content_factory="..groupfolder.GroupFolder"
    arguments="prefix"
    />
<addMenuItem
    title="Group Folder"
    description="A Group folder"
    permission="zope.ManageServices"
    class="..groupfolder.GroupFolder"
    view="AddGroupFolder.html"
    />
<containerViews
    for="..groupfolder.IGroupFolder"
    contents="zope.ManageServices"
    index="zope.ManageServices"
    add="zope.ManageServices"
    />
</configure>