Description of the illustration supplemental_table_logging.eps

{ ADD SUPPLEMENTAL LOG
  { supplemental_log_grp_clause | supplemental_id_key_clause }
    [ SUPPLEMENTAL LOG
       { supplemental_log_grp_clause | supplemental_id_key_clause }
    ]...
| DROP SUPPLEMENTAL LOG
  { supplemental_id_key_clause | GROUP log_group }
    [ SUPPLEMENTAL LOG
       { supplemental_id_key_clause | GROUP log_group }
    ]...
}