1    /DESCENDANTS

    Format options:

       /DESCENDANTS
       /NODESCENDANTS (default)

    Specifies whether CDO deletes members. When you specify the
    /DESCENDANTS qualifier, CDO deletes all members that are not
    also members of additional elements outside the area defined by
    your top collection.

2    /LOG

    Format options:

       /LOG
       /NOLOG (default)

    Specifies whether CDO displays text confirming that the
    collection is deleted.