GS1 General Specifications — identification keys, data attributes and barcodes
The foundational GS1 standard defining how identification keys, data attributes and barcodes are constructed and used — GTIN, SSCC, SGTIN, GS1 Application Identifiers, GS1-128 and GS1 DataMatrix. Released annually each January; Release 26.0 was published in January 2026.
What this does not cover
stated in the document's own scope- Define identification and barcode syntax, not the legal serialisation obligation, which comes from DSCSA, the EU FMD, or UDI rules.
- Are voluntary consensus standards, not a regulation; GS1 certifies nothing about product quality or GMP compliance.
- Cover product and unit identification, not the supply-chain event-data exchange itself, which is the subject of GS1 EPCIS.
Always verify against the current published text before relying on it for a submission or inspection.
Overview
The GS1 General Specifications are the foundational standard defining how GS1 identification keys, data attributes, and barcodes are constructed and used. They specify the identification keys — the GTIN for trade items, the SSCC for logistic units, and others — the Application Identifiers that give structured data elements their meaning, and the barcode carriers such as GS1-128 and GS1 DataMatrix, including how data is encoded, formatted, and printed. In healthcare and pharmaceutical supply chains these specifications underpin serialised product identification: the SGTIN and the human- and machine-readable data that travel with a saleable unit.
Scope & applicability
Any organisation applying or reading GS1 identifiers — which in practice means every party to a serialised pharmaceutical or device supply chain.
Legal basis & how it acquires force
The GS1 General Specifications are issued by GS1, a not-for-profit standards organisation; they are voluntary consensus standards, not law. Their reach becomes effectively mandatory where regulations require the outcome and defer to GS1 for the identifier syntax: the US Drug Supply Chain Security Act (DSCSA), the EU Falsified Medicines Directive and its delegated regulation, and medical-device Unique Device Identification rules all specify what must be identified and leave the encoding to GS1. The document is revised and published annually; Release 26.0 was issued in January 2026.
Document structure
| Part | Covers |
|---|---|
| Identification keys | GTIN, SSCC, GLN, and the other GS1 keys and their allocation rules |
| Application Identifiers | The AI prefixes that define batch/lot, expiry, serial number, and other data elements |
| Barcode symbologies | GS1-128, GS1 DataMatrix, GS1 DataBar, and EAN/UPC — encoding and structure |
| Symbol specification and quality | Dimensions, print quality, symbol placement, and human-readable interpretation |
| Application standards | How keys, AIs, and symbols combine for use cases including healthcare and logistics |
Key requirements
- Correct construction of identification keys for the product hierarchy in use
- Barcode symbology, dimensions and print quality meeting the specified grade
- Alignment of the release in use with what trading partners are exchanging
Implementation tips
- Verify printed symbols to the specified grade as an in-process control, not as a one-off qualification activity
- Review the January release each year for changes affecting allocation rules and Application Identifiers already in use
- Settle GTIN allocation rules with regulatory and commercial before launch — retrofitting a GTIN change across a distributed supply chain is far harder than deciding it once
Where this control fails
live FDA enforcementLive FDA recalls SPEQ maps to this standard’s topics — a SPEQ interpretation, not an FDA classification.
International alignment
The General Specifications sit within the GS1 system and are relied on by regulatory identification mandates worldwide — DSCSA in the US, the EU FMD (Delegated Regulation 2016/161), and device UDI frameworks — which specify the identification outcome and adopt GS1 syntax to achieve it. They complement GS1 data-exchange standards (such as EPCIS for event data) that carry the movement history built on these identifiers.
GS1 General Specifications: frequently asked questions
Quick answers to common questions about GS1 General Specifications.
Which release of the GS1 General Specifications is current?
The specifications are revised annually each January. Release 26.0 was published in January 2026.
Are the GS1 General Specifications a legal requirement?
The standard itself is voluntary. It becomes effectively mandatory where regulations — DSCSA, the EU Falsified Medicines Directive, device UDI rules — require identification and adopt GS1 syntax to specify how it is encoded.
What is a GTIN?
The Global Trade Item Number, the GS1 identification key for a trade item. It is one of the keys defined by the General Specifications; the serialised form used in pharma (SGTIN) adds a unique serial number via an Application Identifier.
This standard in practice
Recall domain is a SPEQ mapping of this standard’s topics, not an FDA classification.