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GS1 System

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GS1 Application Identifier

With the GS1 Application Identifier, a batch number (lot number) or expiration date can be encrypted in the same barcode.

The GS1 Application Identifier (AI) describes the meaning, structure and function of the individual data elements in GS1 barcodes and in the GS1 System. AIs are used in the GS1-128 Barcode, GS1 DataBar or GS1 DataMatrix. They are two-, three- or four-digit numbers. AIs are used in the GS1-128 Barcode, GS1 DataBar or GS1 DataMatrix and GS1 QR Code. 

GS1 Application Identifier