GS1 DataBar is a newer global bar code standard formerly known as Reduced Space Symbology (RSS). GS1 DataBar would be available on all trade item scanning systems, and retail POS (point of sale) scanners should be able to differentiate between the various GS1 barcode symbologies by then. All GS1 DataBar barcodes encode a GTIN-12 or GTIN-13 in a 14-digit data structure.
GTIN stands for Global Trade Item Number. It is a numbering system developed by GS1 System to indentify trade items such as products and services. The system provides unique identification worldwide and a GTIN can be used in barcodes or as Electronic Product Codes in Radio Frequency Identification (RFID) tags. GTIN can be represented by 8, 12, 13 or 14 digits.
Databar code 128 is effective, high density barcode symbology which permits the encoding of alphanumeric data. This symbology includes checksum digit for verification. Databar code 128 set A provides useful for those applications where large amount of data must be encoded in small amount of space.
All three Code 128 code sets have their own unique start bars that allow scanners to differentiate between three code sets i.e code 128 set A, code128 set B and code 128 set C. Code 128 code set A start bar has its own check digit calculation value assigned to it.