What is GS1?
Executive Summary
Almost every organisation beginning work on a Digital Product Passport encounters GS1 within the first few weeks, usually in one of three ways: someone mentions barcodes, a retailer asks for a GTIN, or a technical document references GS1 Digital Link. The name is familiar and the role is routinely misunderstood.
Three distinctions carry most of the confusion, and they run through this entire article.
GS1 the organisation is a neutral, not for profit standards body, governed by its members and operating through national member organisations in over a hundred countries. It develops and maintains standards, licenses identification prefixes, and provides services to the companies that use them.
GS1 standards are the technical specifications the organisation publishes: identification keys, barcode symbologies, data exchange formats and event models. They are voluntary. They acquire their value from the fact that a very large number of organisations have chosen to use the same ones.
Regulatory requirements are set by legislators, not by GS1. GS1 has no enforcement power, cannot compel adoption and does not certify legal compliance. What regulators do, frequently, is require an outcome, such as a unique identifier that is interoperable and based on open standards, that a recognised standard happens to satisfy. That is a reference to a standard, not a delegation of authority to a standards body.
The fourth element, industry adoption, is what makes any of it work. A standard nobody uses solves nothing. GS1 identification is present on a substantial majority of retail products worldwide, and that installed base is the actual reason it matters for passport work: the identity layer largely already exists.
This article explains what GS1 is, how its standards are developed, which standards are relevant, and how identification, capture and exchange fit together. It introduces the Global Product Identification Framework, an original tieback model describing how a physical product becomes trusted information in the hands of a consumer or a regulator.
- GS1 is a neutral not for profit standards organisation, not a regulator, not a vendor and not a certification body. - GS1 standards are voluntary. Their power comes from near universal adoption in retail supply chains, not from legal force. - The system has three layers: identify, capture, share. Most organisations know the first two as barcodes and have never used the third. - For passport work the relevant pieces are the identification keys, GS1 Digital Link syntax and resolver behaviour. - Legislation increasingly requires outcomes such as unique, interoperable, open-standard identification. Recognised standards are a common way to meet that, not the only permitted way. - Identification is only the entry point. A globally unique identifier tells you which product it is; it says nothing about what the product contains.
This is the first article in the Standards & Technology pillar and the eleventh in the tieback Knowledge learning path. It follows How Should Organisations Prepare for Digital Product Passports?, where identification is named as the first hard dependency of any readiness programme.
Explains how global identification standards make a product mean the same thing to every party that handles it.
Table of Contents
- Definition
- The History of GS1
- Why Global Standards Matter
- The Global Product Identification Framework
- How GS1 Standards Work Together
- Common GS1 Standards
- How GS1 Supports Digital Product Passports
- Benefits for Manufacturers
- Benefits for Retailers
- Benefits for Supply Chains
- Benefits for Consumers
- How GS1 Relates to Other Standards
- Common Misconceptions
- Frequently Asked Questions
- Key Takeaways
- Related Articles
- Related Glossary Terms
- References
- About This Article
Definition
A global, neutral, not for profit standards organisation, governed by its member companies and operating through national member organisations, which develops and maintains a system of unique identification keys, barcode and data carrier specifications, and data exchange standards for use across supply chains. GS1 issues the company prefixes from which globally unique identifiers are constructed. It is not a regulator, does not enforce its standards and does not certify legal compliance.
The four categories below are distinct, and conflating them is the source of nearly every misconception in this subject area.
The relationship worth understanding is that regulation sets an outcome, standards offer a proven way of achieving it, and adoption determines whether that way is practical. A regulation that requires interoperable, open-standard identification does not thereby make any particular standards body an authority. It creates a requirement that recognised standards are well positioned to satisfy.
The History of GS1
The origin story is unusually concrete for a standards body, and it explains the organisation’s character.
In the early 1970s, the United States grocery industry faced a checkout problem: scanning required a single product code that every manufacturer and every retailer would accept. Competing proprietary schemes existed and none could win, because the value of a code depends on universal acceptance rather than on technical superiority. An industry committee selected a symbol and a numbering system, and in 1973 the Universal Product Code was adopted. The first retail barcode scan took place in 1974.
Europe followed with the European Article Number in 1977, designed to be compatible with the American system rather than to compete with it, administered by an international association that would eventually become EAN International. The two systems formally aligned, and in 2005 the organisations unified under the name GS1.
Three features of that history persist and matter.
It was created by industry, for industry. GS1 exists because competing companies needed a shared neutral system that none of them controlled. Neutrality is not a marketing position; it is the reason the organisation was viable in the first place.
It solved a coordination problem, not a technical one. The technical difficulty of a numbering scheme is trivial. The difficulty is getting thousands of independent organisations to use the same one. Every subsequent GS1 standard has faced the same challenge.
It is federated. GS1 operates through national member organisations, which license company prefixes locally while the standards remain global. This is why the experience of joining differs by country while the resulting identifiers are internationally valid.
The barcode succeeded because it solved a shared problem that no single company could solve alone, and because adoption reached the point where not participating became the expensive option. Digital Product Passport interoperability faces a structurally identical problem across a wider set of participants: manufacturers, retailers, repairers, recyclers and authorities. Understanding that the challenge is coordination rather than technology explains why standards work is slow, and why it is worth aligning with something widely used rather than optimising a private scheme.
Why Global Standards Matter
A standard is an agreement that removes a choice in order to create a shared capability. The cost is flexibility; the return is that everyone else understands you.
Without shared identification, every relationship is bilateral. If each retailer, marketplace and authority requires its own product code, an organisation maintains one mapping per counterparty. The effort grows with the number of relationships, and every mapping is a place where information can diverge.
Ambiguity has a real cost. Two different products with the same internal code, or one product with three codes across three systems, produces mis-shipments, duplicate records, inaccurate stock and, in a field action, an inability to determine what is actually affected. This is not a theoretical problem; it is the most common finding in product data assessments.
Interoperability is a stated regulatory expectation. Where a Digital Product Passport applies, data is required to be based on open standards and to be interoperable, machine readable, structured and searchable. Those are properties a shared standard delivers by construction and a private scheme must recreate.
Standards outlive systems. Software is replaced every five to ten years. A globally unique identifier printed on a product that will exist for twenty years must survive that turnover. Identity belongs to a standard, not to a system.
A components manufacturer used an internal part number scheme that encoded material and dimension. It was elegant and it worked internally for decades. As the customer base grew, each of eleven major customers requested its own code format, so eleven mapping tables were maintained by hand. A substance restriction then required identifying every affected item across all channels. The technical question was simple; answering it took nine weeks, because the mappings disagreed and no single table was authoritative. The scheme was not badly designed. It was simply designed for one organisation in a problem that had become multi-organisational.
The Global Product Identification Framework
The framework below is an original tieback model. It describes the chain by which a physical object becomes trusted information in someone else’s hands, and it exists to locate GS1 precisely: the organisation’s standards occupy the middle of the chain, not the ends.
The chain has a property worth stating explicitly. Each layer depends entirely on the one beneath it, and a weakness at any layer caps everything above. Excellent passport content resting on ambiguous identification is not a good passport; it is well presented uncertainty.
Physical objects moving through design, production, distribution, use and end of life. At this layer a product is a thing, not yet a record. Nothing can be said about it at scale.
A globally unique, unambiguous reference is attached to the model, the batch or the individual item. This is the first point at which two organisations can be certain they are discussing the same thing.
Shared rules for how identifiers are constructed, how they are encoded in a carrier, how attributes are named and typed, and how events are described. This is the layer GS1 principally occupies, alongside other standards organisations.
Information moves between organisations without transcription: master data to customers, event data along the chain, attribute data to systems that consume it directly.
A maintained, resolvable record bound to the identifier, presenting differentiated views to different audiences and remaining available for the required period.
Someone with the product in hand, or an authority with a mandate, reaches trustworthy information about that specific item. Everything below exists to make this moment reliable.
GS1 sits at layers 2 to 4: it provides the identification keys, the standards that give them meaning, and the exchange mechanisms that move information between organisations. It does not make products, does not own passport content, and does not regulate. The framework’s argument is that each layer caps the one above it, which is why identification, the least visible layer, is where readiness programmes must start.
How GS1 Standards Work Together
GS1 describes its system in three parts, and the structure is genuinely useful because most organisations have adopted the first two without ever reaching the third.
Identify. Assigning globally unique keys to the things that need to be referred to unambiguously: trade items, locations, parties, logistics units, assets, documents. Uniqueness comes from the company prefix, licensed to a single organisation, which no other organisation may use.
Capture. Encoding those keys into something a machine can read: a linear barcode, a two dimensional symbol such as DataMatrix or a QR code, or an RFID tag. The data carrier is the bridge between the physical object and the digital record.
Share. Exchanging information about the identified thing: master data describing what the product is, transactional data about orders and shipments, and event data recording what happened to it, where and when.
The three build in order. A key with no carrier cannot be read from the product. A carrier with no shared data behind it produces a number and nothing else. This is precisely why organisations that have used barcodes for thirty years often find they are much less prepared for passports than they expected: they implemented identify and capture, and never needed share.
Having barcodes on products demonstrates that identification and capture were solved, usually decades ago and usually for point of sale. It says nothing about whether attribute data is structured, owned, accurate or exchangeable, and nothing about whether identification exists below the model level. Organisations regularly enter a passport programme confident that identity is handled, then discover the barcode identifies a sellable unit while the compliance evidence attaches to a manufacturing batch that has no identifier at all.
Common GS1 Standards
The following are the standards most often encountered. This is a descriptive summary, not an implementation specification; the authoritative definitions are in the GS1 General Specifications and in each standard’s own document, both linked in the references.
Two clarifications are worth making because they are persistently confused.
A GTIN is not a barcode. The GTIN is the number. The barcode is one way of carrying it. The same GTIN can appear in a linear barcode, a DataMatrix, a QR code and an RFID tag simultaneously.
GS1 Digital Link is not a symbology either. It is a syntax for expressing identifiers inside a web address, plus a resolution behaviour. It can be encoded in any carrier capable of holding a URI.
In the traditional model, a carrier points at one fixed destination, so changing where the information lives means reprinting the product. Under Digital Link, the carrier expresses the identifier, and a resolver holds a set of destinations for it: product information, instructions, safety data, certification, a passport endpoint. The destination returned depends on who is asking. This is the mechanism by which one printed symbol serves a consumer, a repairer, a recycler and an authority differently, and it is why the differentiated access that legislation expects is achievable at all without four separate labels.
How GS1 Supports Digital Product Passports
Three specific contributions, plus one clear boundary.
Unique identification that already exists. Where a passport requires a unique product identifier, an organisation using GS1 keys has one, allocated from a prefix nobody else may use, recognised internationally. The identity layer is often the single piece of passport groundwork already largely complete, which is not true of anything else.
A carrier and resolution mechanism. Digital Link plus a resolver satisfies the requirement that passport data be reachable from the product while remaining changeable, and supports differentiated access without changing anything physical. See How Does a Digital Product Passport Work? for the mechanism in full.
Exchange patterns for attributes and events. Master data synchronisation and event standards are existing, proven routes for moving structured product information between organisations, which is what supplier data collection ultimately requires.
The boundary. GS1 standards do not determine what a passport must contain, do not create or validate the content, and do not assign legal responsibility. What information a passport carries is set by legislation per product group; who is accountable for its accuracy is set by product law. See What Information Does a Digital Product Passport Contain?.
ESPR requires that passport data be accessible through a data carrier linked to a unique product identifier, that access be differentiated between the general public, authorities and actors with a legitimate interest, and that the data be based on open standards and be interoperable, machine readable, structured and searchable. It expresses requirements in terms of outcomes and open standards rather than by designating a single standards body, and the specific fields and dates are set per product group in each delegated act. Recognised standards such as those maintained by GS1 are a widely used means of meeting these outcomes. They are not, in themselves, the legal requirement. See What is ESPR?.
Two decisions made early determine how much rework a passport programme faces later. First, base identification on a widely adopted standard rather than an internal scheme, because the identifier will be read by parties you have no relationship with and will outlive your systems. Second, never print a destination address on a product. Print the identifier, and let a resolver decide where each audience is sent. Products in the field then keep working when content is restructured, a system is replaced or a passport endpoint moves. Organisations that print destination URLs lose that flexibility permanently, for the life of every unit already shipped.
Benefits for Manufacturers
- Identity that travels. One identifier accepted by customers, marketplaces, logistics providers and authorities, instead of one scheme per counterparty.
- A precondition for batch level recall. Precise field actions require identification at the level where the variation occurs, which standardised batch and serial identifiers provide.
- Reduced onboarding effort. New retailers and channels usually accept standard keys, turning onboarding into a mapping exercise rather than a code negotiation.
- Interoperability without bilateral integration. Structured exchange with many partners on one set of rules.
- Longevity. Identity survives system replacement, which internal schemes tied to a specific platform frequently do not.
Benefits for Retailers
- Unambiguous receiving and stock control, since the item on the shelf, in the system and on the invoice are provably the same item.
- Automated master data intake from suppliers, reducing the retyping of product attributes.
- Faster supplier onboarding, because a shared identification scheme removes the first and slowest negotiation.
- Precise withdrawal and recall, where affected stock can be isolated rather than cleared wholesale.
- A route to richer consumer information, since a single scannable symbol can lead to more than a price lookup.
Benefits for Supply Chains
- Shared meaning across organisations. Parties who have never traded before can still refer to the same item without a mapping exercise.
- Event level visibility. Standardised event descriptions allow a chain to record what happened, where, when and why in a form others can interpret.
- Traceability that survives handoffs, which is the point at which proprietary identifiers usually fail.
- Lower integration cost per relationship. The marginal cost of adding a partner falls, which is the entire economic argument for standardisation.
- A basis for provenance claims. Statements about origin and chain of custody require identity that is stable across every party that handled the item.
Benefits for Consumers
- A single scan that leads somewhere useful, rather than a search that may or may not find the right product.
- Certainty of match. The information shown relates to the item in hand, including its batch, rather than to a similar product.
- Access to repair, spare part and disposal information, which supports keeping a product rather than replacing it and feeds the circular economy.
- Verifiable rather than asserted claims, since a resolvable record maintained by an identified responsible party is a different thing from a statement on packaging.
- Continuity over the product’s life. Because the resolver can be updated, a scan continues to work years after purchase even as systems change behind it.
How GS1 Relates to Other Standards
GS1 is one participant in a wider ecosystem, and passport implementations typically involve several standards bodies at once.
Two points follow.
Standards are layered, not competing. Identification, carriers, vocabularies, exchange protocols and sector data models operate at different levels. Asking whether to use GS1 or ISO is usually a category error; a typical implementation involves several.
European standardisation is where passport specifics are being developed. Standardisation requests supporting ESPR are directed to the European standardisation organisations. Those bodies routinely build on existing international work rather than replacing it, which is the normal relationship between regulation and standards: legislation states the outcome, standardisation defines a technically detailed way to reach it, and existing widely adopted standards are the usual raw material.
Common Misconceptions
- “GS1 is a regulator.” It is not. It is a member-governed not for profit standards body with no enforcement power and no authority to determine legal compliance.
- “ESPR mandates GS1.” It does not name a standards body. It requires outcomes: unique identification, open standards, interoperability, machine readability. Recognised standards are a common way to satisfy these.
- “GS1 is a company selling software.” It publishes standards and provides services through national member organisations. Software implementing GS1 standards comes from many independent providers.
- “A GTIN is a barcode.” The GTIN is the number; a barcode is one carrier for it. The same number can appear in several carrier types at once.
- “GS1 Digital Link is a type of QR code.” It is a URI syntax and resolution behaviour. It can be carried in a QR code, a DataMatrix or an RFID tag.
- “We have barcodes, so identification is solved.” Retail barcodes usually identify a sellable model. Passports often need batch or item level identification, which is different work.
- “An identifier is the passport.” Identification says which product it is. It says nothing about composition, evidence or repairability. See What is a Digital Product Passport?.
- “Standards remove commercial choice.” They standardise the interface between organisations. What is published, to whom, and how it is presented remains entirely a business decision.
Frequently Asked Questions
Is GS1 a regulator or an official EU body?
Neither. GS1 is an independent, not for profit, member-governed standards organisation. It has no legal authority, cannot enforce anything and cannot certify that a product or a passport complies with legislation. Regulators sometimes reference recognised standards, and standards bodies sometimes participate in standardisation work supporting legislation, but the two roles remain distinct.
Does the law require us to use GS1 standards?
ESPR does not designate a standards body. It requires unique identification, open standards, interoperability, machine readability and differentiated access. Widely adopted standards are the most practical way most organisations meet those requirements, and delegated acts and European standardisation work may refer to specific technical standards for particular product groups. Check the instrument that applies to your products rather than assuming either way.
What is the difference between a GTIN and a serial number?
A GTIN identifies a product model, the kind of thing that shares a price and a specification. A serial number distinguishes one individual item from another of the same model. Combining them produces item level identity. A batch or lot number sits between the two, identifying a production run. Which level you need is a per-category decision driven by whether the required information varies between runs or between individual items.
Do we need GS1 membership to run a Digital Product Passport?
Not inherently. What legislation requires is unique, interoperable identification based on open standards. Obtaining a licensed company prefix is the usual route to globally unique keys, and for most organisations selling through retail it is already in place for commercial reasons. Whether it is necessary in your case depends on your products, your channels and the instrument that applies to you.
Can we use our existing internal part numbers?
Internally, yes, and you should keep them. The difficulty is that internal schemes are only guaranteed unique within your organisation, so two companies can and do use the same code for different products. Passport identifiers are read by parties who have no relationship with you. The normal pattern is to retain internal numbers as an attribute and map them to a globally unique key, rather than to replace them.
What is a resolver, and do we need one?
A resolver is the service that receives a scanned identifier and returns the right destination for the requester, rather than the carrier pointing at one fixed page. You need resolution behaviour of some kind if you intend to serve different audiences from one symbol, or to change where information lives without reprinting products. Both of those are effectively unavoidable for a passport with differentiated access.
How does GS1 relate to ISO and CEN?
They operate at different levels and frequently overlap by design. Some GS1 standards are also published as ISO or IEC standards. European standardisation bodies develop standards supporting EU legislation, typically building on existing international work rather than replacing it. A single passport implementation commonly involves several standards families at once.
Is an identifier enough to satisfy passport requirements?
No, and this is the most consequential misunderstanding in the subject. Identification establishes which product the record is about. Everything that makes a passport useful, composition, compliance evidence, repairability, end of life handling, is separate work resting on top of it. Identification is the precondition, not the deliverable.
Key Takeaways
- GS1 is a neutral, member-governed, not for profit standards organisation. It is not a regulator, not a vendor and not a certification body. - Keep four things separate: the organisation, its standards, regulatory requirements and industry adoption. Nearly every misconception is a conflation of two of them. - The system is identify, capture, share. Most organisations solved the first two decades ago for point of sale and have never used the third. - Regulation states outcomes such as unique, interoperable, open-standard identification. Recognised standards are a proven way to meet them, not the legal requirement itself. - A GTIN is a number, not a barcode, and Digital Link is a syntax, not a symbology. Both distinctions matter in practice. - Print the identifier and resolve the destination. Printing a fixed URL forfeits flexibility for the life of every unit already shipped. - Retail barcodes identify sellable models; passports often need batch or item level identity, which is separate work. - Identification is the floor of the framework, not the ceiling. It tells you which product it is and nothing about what the product contains.
Related Articles
- What is a GTIN?
- What is GS1 Digital Link?
- QR Codes vs GS1 Digital Link: What’s the Difference?
- What is a Data Carrier?
- How Does a Digital Product Passport Work?
- How Product Data Moves Through the Supply Chain
- How Will Digital Product Passports Change Product Compliance?
- What is EPCIS?
Related Glossary Terms
Definitions of record for the terms used above live in the glossary.
- GS1
- GS1 Digital Link
- Product Identifier
- Data Carrier
- QR Code
- Digital Product Passport
- ESPR
- Delegated Act
- Economic Operator
- Market Surveillance
- Conformity Assessment
- Product Data
- Product Traceability
- Product Lifecycle
- Sustainability Data
- Circular Economy
References
- GS1, the global organisation and its standards: https://www.gs1.org
- GS1 General Specifications, the core standard defining keys, carriers and application identifiers: https://www.gs1.org/standards/barcodes-epcrfid-id-keys/gs1-general-specifications
- GS1 identification keys, including GTIN, GLN and SSCC: https://www.gs1.org/standards/id-keys
- GS1 Digital Link standard: https://www.gs1.org/standards/gs1-digital-link
- GS1 EPCIS and Core Business Vocabulary, for supply chain event data: https://www.gs1.org/standards/epcis
- GS1 Global Data Synchronisation Network: https://www.gs1.org/services/gdsn
- Regulation (EU) 2024/1781 establishing a framework for the setting of ecodesign requirements for sustainable products, including the Digital Product Passport provisions, Official Journal of the European Union: https://eur-lex.europa.eu/eli/reg/2024/1781/oj
- Regulation (EU) 2023/1542 concerning batteries and waste batteries, including the battery passport, Official Journal of the European Union: https://eur-lex.europa.eu/eli/reg/2023/1542/oj
- Regulation (EU) No 1025/2012 on European standardisation, setting out how the Commission requests standards in support of Union legislation: https://eur-lex.europa.eu/eli/reg/2012/1025/oj
- European Committee for Standardization (CEN): https://www.cencenelec.eu
- International Organization for Standardization (ISO): https://www.iso.org
- EUR-Lex, official portal for European Union law: https://eur-lex.europa.eu
About This Article
tieback Knowledge is a continuously maintained reference library covering Digital Product Passports, product traceability, product compliance and related regulations. Articles are reviewed regularly as legislation, standards and implementation guidance evolve.
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