GS1-128

GS1-128
User Mike1024 · Public domain · source
Name	GS1-128
Caption	Example of a Code 128 barcode symbol used in logistics
Introduced	1990s
Type	Linear barcode
Capacity	Variable
Standards	ISO/IEC 15417, GS1 General Specifications

GS1-128 GS1-128 is a specialized linear barcode symbology used to encode standardized supply chain data using the Code 128 character set. It is widely employed in logistics, warehousing, retail, pharmaceuticals, and transportation to link identifiers, dates, weights, and batch information to physical trade items, pallets, and shipments. Major organizations such as International Organization for Standardization, European Committee for Standardization, United Nations Economic Commission for Europe, World Health Organization, and GS1 collaborate with industry players like Walmart, Amazon (company), Maersk, DHL, and FedEx on interoperable deployments.

Overview

GS1-128 derives from the Code 128 symbology and is governed by GS1 technical rules described in the GS1 General Specifications and related standards such as ISO/IEC 15417. It uses standardized data structures to carry identifiers like the Global Trade Item Number (GTIN), Global Location Number (GLN), Serial Shipping Container Code (SSCC), and regulatory data referenced by organizations like U.S. Food and Drug Administration, European Medicines Agency, and International Air Transport Association. Supply chain adopters including Procter & Gamble, Unilever, Tesla, Inc., Ford Motor Company, and Toyota Motor Corporation use GS1-128 on labels to support traceability programs influenced by legislation such as the Drug Supply Chain Security Act and initiatives by United Nations agencies.

Structure and Encoding

The symbol encodes data using the Code 128 character set with function codes and application identifier prefixes; physical symbol design follows ISO/IEC 15417. Typical GS1-128 payloads start with pairs of digits representing Application Identifiers (AIs) which define data semantics, as standardized by GS1. The barcode uses start/stop characters and a checksum derived from weighted values similar to those in ISO 6346 container coding practices. Implementation considerations often reference specifications produced by bodies like European Medicines Verification Organisation and National Institute of Standards and Technology for quality and conformance.

Application Identifiers (AIs)

Application Identifiers are numeric prefixes that declare the meaning and format of following data elements, mapping to identifiers used by entities such as International Maritime Organization and Food and Agriculture Organization. Common AIs include those for GTIN (01), SSCC (00), batch/lot number (10), production date (11), and best-before date (17); these are coordinated by GS1 and used by trading partners like Carrefour, Tesco, Costco, and Kroger. AIs also support regulatory identifiers such as National Drug Code mappings referenced by Centers for Disease Control and Prevention and recall management by European Food Safety Authority.

Use Cases and Industries

GS1-128 is prominent in logistics chains operated by Maersk Line, Mediterranean Shipping Company, and COSCO, in retail networks managed by Walmart and Amazon (company), and in healthcare systems including hospitals affiliated with Mayo Clinic, Johns Hopkins Hospital, and Cleveland Clinic. The symbol is used on pallet labels conforming to guidelines from UN/EDIFACT, on air waybills governed by International Air Transport Association resolutions, and on pharmaceutical packs for serialization initiatives led by agencies such as the European Medicines Agency and U.S. Food and Drug Administration.

Implementation and Printing

Label formats for GS1-128 are specified in GS1’s label grammar and are commonly printed using thermal transfer, direct thermal, or laser printers supplied by manufacturers like Zebra Technologies, SATO Corporation, and Honeywell International Inc.. Print quality is influenced by standards from International Electrotechnical Commission and ISO print metrics; encoding software solutions from SAP SE, Oracle Corporation, Manhattan Associates, and open-source libraries integrate AI logic and checksum calculation. Compliance testing is performed using verifiers meeting ISO/IEC 15426 criteria and services from Underwriters Laboratories, TÜV SÜD, and SGS SA.

Scanning, Decoding, and Data Validation

Scanners and imaging systems from Cognex Corporation, Datalogic S.p.A., Honeywell, and Zebra Technologies decode GS1-128 using algorithms compliant with ISO/IEC 15417 and GS1 rules; enterprise resource planning systems from SAP SE and Oracle Corporation validate AIs against master data in registries maintained by GS1 US and other country organizations. Quality assurance involves verifying print contrast, quiet zones, and symbol redundancy following protocols promulgated by ISO committees and audit frameworks used by retailers like IKEA and Inditex.

Adoption, Standards, and Governance

Governance of GS1-128 rests with GS1 in collaboration with standards organizations such as International Organization for Standardization, European Committee for Standardization, and regional GS1 Member Organisations including GS1 US, GS1 UK, and GS1 Germany. Adoption is driven by major retailers, logistics providers, and regulators including U.S. Food and Drug Administration, European Medicines Agency, and trade associations like International Chamber of Commerce and Global Food Safety Initiative. Ongoing updates are coordinated through GS1 advisory councils, industry working groups involving companies such as Unilever, Nestlé, Johnson & Johnson, and policy inputs from entities like World Health Organization and United Nations Economic Commission for Europe.

Category:Barcodes