GS1

GS1 is a global not-for-profit organization that develops and maintains the most widely used identification standards in commerce and logistics worldwide. Its mission is simple to state and enormous in scope: that a product, a case or a pallet is identified the same way regardless of the country, the company or the system processing it. When you scan the barcode on a package of cookies in any supermarket on the planet, you are using a GS1 standard.

GS1's core contribution is its identification keys: the GTIN (the number behind a product's barcode), the SSCC (the identifier of a logistic unit such as a pallet), the GLN (the location) and others. On top of those keys sit the data carriers (linear barcodes, GS1-128, the two-dimensional GS1 DataMatrix) and the data sharing standards (EDI, EPCIS). That unique, universal identification is the technical foundation that makes end-to-end traceability possible, part of what Trazzo orchestrates when it connects each link in the chain.

Why GS1 exists and what problem it solves

Before GS1 standards, each company identified its products its own way: the same item could have one internal code at the factory, another at the distributor and a third at the retailer. Every time the goods changed hands, codes had to be translated, and any error spread downstream. GS1 was born to solve that chaos with a common language: a unique key, assigned only once, that travels with the product from the moment it is manufactured until it is sold or recycled. The key is global and unambiguous, so the GTIN of an Argentine product means exactly the same thing when that product is exported to Brazil, Spain or the United States.

GS1 is organized into local offices by country (in Argentina, GS1 Argentina; in other markets, its national equivalent) that assign company prefixes to the companies that join. That prefix is the root from which each company generates its own GTINs, SSCCs and other keys, guaranteeing that they are never repeated anywhere in the world. The standard is vendor-neutral: it does not belong to any software or hardware manufacturer, which explains why retailers, pharmaceutical labs, logistics providers and public agencies have all adopted it.

The GS1 system in three layers

The standard is easier to understand as layers that work together. Identification answers what it is and where it is; the data carrier answers how I read it; and data sharing answers how I share the information between systems.

• Identification (the keys): the GTIN identifies a trade item; the SSCC identifies a logistic unit (case, pallet); the GLN identifies a location or entity; there are also keys for assets, shipments and documents.
• Capture (the data carriers): the classic EAN/UPC barcode for the point of sale; GS1-128 and GS1 DataMatrix for logistics and traceability, capable of carrying lot, expiration date and serial number in addition to the GTIN.
• Sharing (exchanging data): standards such as EDI for orders and invoices, and EPCIS for recording traceability events (what, where, when and why) that let you reconstruct a product's journey.

GS1 vs a proprietary internal code

Many companies start with internal coding (their own SKU, a label made at the plant) and only later adopt GS1. The difference is structural and worth being clear about:

The internal SKU does not go away: it is still useful for in-house operations. What GS1 does is give it a universal identifier for when the product goes out into the world and has to talk to third-party systems.

A concrete example in Argentina and the region

Think of a consumer goods food manufacturer that supplies the large Argentine chains. For its products to get onto the shelf, the chains require a GS1 GTIN printed as a barcode on every saleable unit, and logistics labels with an SSCC on the pallets arriving at the distribution center. In the pharmaceutical sector, the health traceability system relies on serialized identification standards of this kind to track each package, medicine by medicine. And in exports, when that same manufacturer ships to a Brazilian or European retailer, it does not have to recode anything: its GTIN is already valid on the other side of the border.

Common mistakes when implementing GS1

• Reusing a GTIN for a different product (a change in formula, size or presentation): the GTIN must be new when what the consumer perceives changes.
• Confusing the internal SKU with the GTIN: they are different things; the SKU is yours, the GTIN is global.
• Printing low-quality codes that do not scan well at the retailer, causing rejections at receiving.
• Not aligning master data (dimensions, weight, description) with what the label actually carries, which breaks traceability and invoicing.

Understanding GS1 means understanding the invisible scaffolding that makes modern commerce work: without that common identification there would be no supermarket checkout scanning in seconds, no traceability of an expired lot and no logistics able to move millions of packages without losing track of them. It is the shared grammar on which almost everything else in the supply chain is built.