An online check digit calculator is available at. Using a MOD10 check digit algorithm, the calculated check digit prevents substitution errors. Check Digit – The last digit of GTIN-14 is a calculated check digit.For cartons that contain an assortment of items a new product number is assigned. Item Reference– References the same product number used for the item level GTIN (GTIN-8, GTIN-12, GTIN-13) when a carton is made up of the same item.Depending on the number of items a company needs to identify, a GS1 Company Prefix may be 7 to 10 digits in length. GS1 Company Prefix – Vendors must obtain a GS1 Company Prefix directly from GS1 to uniquely identify their company.This one-digit prefix can range from 0 to 8. Indicator – This denotes the level of packaging for a particular carton.The GTIN-14 data structure is comprised of four components: In most environments, these cartons are not read by point-of-sale scanners and do not carry a UPC barcode symbol.Īn ITF-14 barcode encodes the GTIN-14 information. Logistic shelf and master cartons should be identified with a GTIN-14 identifier.
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