GTIN

A GTIN is the number behind the barcode on a retail product. It identifies the product type — a 750ml bottle of a specific wine, a specific SKU of trainers in a specific size — globally and unambiguously.

A GTIN alone doesn't identify a specific item — every bottle of that wine shares the same GTIN. To identify an individual unit, you combine GTIN with a serial number (giving you an SGTIN) or a lot/batch code.

GTINs are the foundation everything else builds on: GS1 Digital Link, EPCIS event records and DPP look-ups all start from a GTIN.