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GS1 Application Identifiers
GS1 Application Identifiers are a finite set of defined identifiers used to connect physical things and logical things to information or business messages related to them. The definitions for them reside in a standard called the GS1 General Specifications that is available from GS1 Member Organizations.
Key Concepts
- There are approximately 100 Application Identifiers (AI)
- Each AI has a two, three, or four digit numeric Prefix in front of the data to tell what the data means. For example, the AI for SSCC is (00) and for GTIN it is (01)
- GS1-128, RSS, GS1 DataMatrix, and Composite Component can carry AIs
- More than one AI can be carried in one bar code. When this happens, AIs with a fixed length data content (e.g., SSCC has a fixed length of 18 digits) are placed at the beginning and AI with variable lengths are placed at the end. If more than one variable length AI is placed in one bar code, then a special "function" character is used to tell the scanner system when one ends and the other one starts.
- When AIs Prefixes appear in the text beside the bar code they are surrounded by parenthesis (e.g., GTIN (01) 10614141000019)
- Seven AIs are used for the Keys (GTIN, GLN, SSCC, GRAI, GIAI, GDTI, GSRN)
- 45 AIs are trade item attributes like variable count, net weight, lot number, and expiry date
- 28 AIs are logistic unit attributes like count of trade items contained, gross weight, gross volume, routing code
- One AI is a physical location attribute called the GLN Extension
- The balance are used for special purposes like Shipment Identification, Consignment Identification, Couponing, Refund Receipts, Electronic Serial Identification for Cellular Mobile Telephones, Internal Use, Payment Slips, and Customer Specified Articles
Key Questions
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