Attribute: Compilation date
Prohibited for ENC
Attribute type: A
The date on which the compilation of the data was completed.
The compilation date should be encoded using 4 digits for the calendar year (CCYY), 2 digits for the month (MM) (e.g. April = 04) and 2 digits for the day (DD), according to ISO 8601: 1988.
19871021 for 21 October 1987 as compilation date.