SubFieldDesignator

SubField Designator extracted from barcode, to support proper document classification based on the standard. subfield designator is a 2-character code that specifies the type of document, typically DL or ID. It is located immediately after the IIN and the variable metadata structure in the PDF417 barcode data structure. for example: ANSI 636010090002DL00410267ZF03080067DLDAQS1234567812300000000000000 ^^ | | | +-- SubField Designator (DL, ID, EN, etc.) +----- IIN (636010)

Mandatory on all AAMVA barcodes.