For your info the GS1-128 symbology isn’t an old defunct standard that uses UPC-A (aka. Type 5) coupon in conjunction with an additional "supplemental" component.
There are implementations for coupon solutions which have used or use GS1-128 barcodes, but that’s another story.
The GS1-128 barcodes are used all over the world to barcode GS1 Application Identifiers (which are as well used within GS1 DataMatrix, GS1 DataMatrix and GS1 QR Codes) on the level of trade units not crossing the Retail Point of Sale and logistic units. Staff within warehouses and other points in the supply chain would like to scan trade units and logistic units as well in order to help the interpret the encoded data.
Selecting the right bar code is critical to the success of your bar code implementation plan, but here are some high level tips:
- If you bar code a trade item that will be scanned at the retail point-of-sale (POS), you must use an EAN/UPC symbol.
- If you are printing a bar code with variable information like serial numbers, expiry dates, or measures, then you will use GS1-128, GS1 DataBar (RSS), or in special cases Composite Component or GS1 DataMatrix symbols.
- If you just want to print a bar code carrying GTIN on a corrugated carton, ITF-14 may be the choice for you.