The original (legacy) format bar code. No longer in use or supported:
Contain an UPC-A code and a required GS1-128 Coupon Extended Code, as shown:
The Transitional format. No longer in use or supported:
The GS1-128 code is replaced with a required GS1 DataBar Expanded Stacked bar code, as shown:
The New Standard
The UPC-A symbol is eliminated, leaving only the GS1 DataBar Expanded bar code, as shown:
•The scanner must be capable of scanning the complete bar code in a single pass (this is not to be considered two bar codes)
For additional information on DataBar Codes see: http://www.gmaonline.org
North_American_Coupon_Application_Guideline.pdf