Glossary
GTIN (Global Trade Item Number)
The unique numeric identifier assigned to a product by GS1 — the same number encoded in every retail barcode in the world.
A GTIN identifies a product variant (size, colour, pack size) but not an individual unit. It's the foundation for retail scanning, e-commerce listings, and now for GS1 Digital Link and Digital Product Passports.
For serialised use cases like authentication or per-unit DPPs, GTINs are extended into SGTINs (Serialised GTINs) so each physical item carries a unique serial in addition to the product code.
Related terms
GS1 Digital Link
A GS1 standard that turns a product's GTIN into a resolvable web URL, letting a single QR code serve consumers, retailers, regulators and supply-chain systems.
SGTIN (Serialised GTIN)
A GTIN combined with a unique serial number, identifying one specific physical item rather than a product line.
QR Code
A 2D matrix barcode that encodes a URL or data string and can be scanned with any modern smartphone camera.