1.CDO>  DEFINE FIELD PRICE
      cont>  DATATYPE IS SIGNED LONGWORD
      cont>  MISSING_VALUE IS 0.

      In this example, the DEFINE FIELD command includes a MISSING_
      VALUE field property that can assign a value of 0 to a null or
      missing value.

    2.CDO>  CHANGE FIELD PRICE
      cont>   NOMISSING_VALUE.

      In this example, the NOMISSING_VALUE keyword removes the
      MISSING_VALUE property from the PRICE field element.