Birth notifications: The format for the file name is YYYYMMDD.BRTHNT where YYYYMMDD is the year, month and date of data in the file, and BRTHNT represents that the data file relates to birth notifications.
Birth registrations: The format for the file name is YYYYMMDD.BRTHRG where YYYYMMDD is the year, month and date of data in the file, and BRTHRG represents that the data file relates to birth registrations.