Format options:

       /DESCENDANTS
       /NODESCENDANTS (default)

    Specifies whether CDO deletes children. When you specify the
    /DESCENDANTS qualifier, and your record element is controlled,
    CDO deletes all children that are not also children of additional
    elements outside the area defined by your top collection. If the
    record element is uncontrolled, CDO deletes all children that are
    not also children of other elements.