An Application Identifier (AI) according to GS1 is a numeric prefix that provides meaning to the data encoded in barcodes, RFID tags, and other GS1-based data structures. Each AI defines the type of data that follows, such as a GTIN (Global Trade Item Number), batch number, expiration date, serial number, and more.
Structure of an Application Identifier (AI)
AIs are numeric codes of 2 to 4 digits.They are followed by data of variable or fixed length, depending on the AI.They are enclosed in parentheses when written for human readability but are not included in the barcode itself.Examples of Common GS1 Application Identifiers
| AI | Description | Example Value |
|---|
| 01 | Global Trade Item Number (GTIN) | 09506000134352
|
| 10 | Batch or Lot Number | ABC1234 |
| 17 | Expiration Date (YYMMDD)
| 250430 |
| 21 | Serial Number | SN12345678 |
| 22 | Consumer Product Variant | BLUEM |
| 00 | Serial Shipping Container Code (SSCC) | 123456789012345678 |
Usage
- Used in barcodes (e.g., GS1-128, Data Matrix, QR Code) and RFID tags.
- Helps in product tracking, traceability, inventory management, and supply chain automation.
- AIs allow multiple data elements to be encoded in a single barcode or tag.