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BarCodes & ID Keys
This section of the Knowledge Center gives you the opportunity to view the GS1 BarCodes and ID Keys standards and provides assistance in their implementation.
BarCodes Standards
- GS1 General Specifications
- The core standards document describing how barcodes and identification keys should be used to comply with GS1 standards.
- GTIN Allocation Rules
- A Global Trade Item Numbers (GTIN) are used to identify any item upon which there is a
need to retrieve pre-defined information and that may be priced or ordered or invoiced at any point in any supply chain. - GLN Allocation Rules
- Global Location Number (GLN) provides the global supply chain solution for the identification of physical locations and legal entities.
BarCodes Support Tools
- GS1 DataBar (RSS)
- Identifies small items and carries more information than the current EAN/UPC bar code
- GS1 Company Prefix
- Provides a way for GS1 Member Companies to uniquely and globally identify things like trade items, logistic units, locations, parties, and assets
- GS1 Identifiers (Keys and Attributes) - Overview
- Identifies trade items (GTIN), locations/trading parties (GLN), logistic units (SSCC), individual assets (GIAI), returnable assets (GRAI), service relationships (GSRN), and document types (GDTI)
- GS1 Identification Key Types
- GS1 Identification Keys that support the identification of items, services, locations, logistic units, returnable containers, etc
- Bar Code Types
- Types of bar codes used by GS1 members
- Bar Code Scanner Environments
- GS1 BarCodes are scanned in different places so GS1 specifies what bar code can be used where and establishes specifications for its use
- Bar Code Printing Methods
- Methods for printing GS1 BarCodes
- GS1 Prefix List
- A list of prefixes assigned by GS1 to GS1 Member Organisations or to specific applications
- Physical Location
- A GS1 GSMP reference document explaining physical location identification and its use.
- Ten Steps to Bar Code Implementation
- The basic steps needed to begin using bar codes
BarCodes Implementation Guides
- General Requirements to Assess Conformance of GS1 BarCodes - Implementation Guide
- Specifies minimum process and technical requirements to assess conformance of GS1 BarCodes.
- Fresh Foods Implementation Guide
- The GS1 AIDC Implementation Guide for Fresh Foods Sold at Point-of-Sale is now available. This guide outlines what retailers and suppliers need to do in order to identify fresh food items at Retail POS and describes the Business Process Changes needed to encode and decode GTIN and/or additional data using GS1 DataBar BarCodes for Variable Measure, Fixed Measure and loose produce fresh food trade items scanned at retail Point-of-Sale.
- GS1 Human Readable Interpretation (HRI) Implementation Guide
- This guide provides an easy to follow guideline for the application of Human Readable Interpretation as it relates to its use with data carriers/bar codes. In the document, each HRI Rule is explained in simple terms along with examples or figures.
- Missing Identification Resolution, Highlighting Serialisation - Technical Implementation Guide
- Describes how to use the current available GS1 standards to solve missing identification primarily with serialisation.
- B2C Extended Packaging Implementation Bulletin
- This Implementation Bulletin provides an overview of the ratified standards that provides a common approach for consumer package marking to support the Trusted Source Data infrastructure that is under development and impacts the GS1 General Specifications.
To find out more information please refer to the BarCodes & ID Keys website.


