GTIN
GTIN (Global Trade Identification number) is developed by GS1, used for the unique identification of trade items. These identifiers represent information that may belong to manufacturer, lot number, retailer or other entity.
There are four GTIN structures with varying lengths and can be represented in these symbologies:
| GTIN Data Structures | Length | Symbology/Data Carriers |
| GTIN – 8 (EAN/UCC-8) | 8 | EAN-8 |
| GTIN – 12 (UCC-12) | 12 | UPC-A, UPC-E |
| GTIN – 13 (EAN/UCC-13) | 13 | EAN-13 |
| GTIN – 14 (EAN/UCC-14) | 14 | ITF-14, GS1-128 (formerly UCC/EAN-128), Reduced Space Symbols, and Data Matrix bar codes, plus EPCs |
Note:
For more information on GTIN - 14, refer to this table:
| Information | AI | Length | Data | Delimiter | Format |
| Batch/Lot Number | 10 | Variable* up to 20 chars | Alphanumeric | FNC1 symbol | |
| Serial Number | 21 | Variable* up to 20 chars | Alphanumeric | FNC1 symbol | |
| Expiration Date | 17 | 6 | Numeric |
YYMMDD YY = tens and units of the year MM = number of the month DD = Day of the month e.g January 2, 2003 will be represented as 030102 |