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GS1 DataBar Coupon
The GS1 Databar Coupon codes have been in use in retail industry since the mid-1980s. At first, it was a UPC with system ID 5. Since UPCs cannot hold more than 12 digits, it requires another bar code to hold the additional information like offer code, expiration date or household ID numbers. Therefore, it gets extension to UCC/EAN 128 bar code attached to it. EAN 13 bar code was also in use instead of UPC, which starts with 99, hence called EAN 99 coupon barcode, and subsequently GS1 Databar. After more than 20 years in use, now there is a need to encode more data for complex couponing, and accommodate longer company ID, and the traditional coupon code becomes less efficient and sometimes not usable at all.〔(【引用サイトリンク】title=Current Coupon Problem )〕
== Common usage ==
In the United States, GS1 DataBar Coupon barcodes are often placed on grocery coupons issued by product manufacturers (so-called Manufacturer Coupons). These grocery coupons are typically used to advertise products by offering discounts to the consumer at the time of purchase. For example, a coupon may offer a $1.00 discount when the consumer purchases a specific brand and flavor of toothpaste.
The GS1 DataBar barcode often cannot be scanned at the register during checkout, and in many cases both a traditional UPC/EAN barcode is placed on the same coupon as a GS1 DataBar barcode in order to allow scanning of the coupon at the register.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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