Identification
SGTIN
Serialised Global Trade Item Number
A GTIN combined with a serial number, so each individual item is uniquely identifiable.
An SGTIN is a GTIN plus a serial number. Where a GTIN identifies the product type, an SGTIN identifies the specific physical unit — this exact bottle, this exact pair of trainers, this exact battery cell.
Serialisation is what makes per-item warranty, authentication, ownership transfer and recall workflows possible. Without it, every unit looks the same to your systems.
Most DPP and connected-product use cases assume SGTIN-level identification, not GTIN-only.