Snapshot=(Allocation=n,File=file-spec)

    Updates the database root file to reflect the snapshot allocation
    or snapshot file specification (or both) for the area it
    qualifies. Use this qualifier to update the root when the
    snapshot attributes have changed since the backup file from which
    you are restoring the database root has changed. This qualifier
    does not change the attributes of the snapshot file it qualifies;
    its purpose is to update the database root file with corrected
    information.

    See the Usage Notes for information on how this qualifier
    interacts with the Root, Snapshot, and Directory qualifiers.

    The Snapshot qualifier is a positional qualifier.

    When you do not specify the Snapshot qualifier, RMU Restore Only_
    Root restores snapshot areas according to the information stored
    in the backup file.