UPC stands for Universal Product Code. This is a code that translates into a vertical barcode using unique product style information. For example, UPC's are usually made up of 12 digits identifying a product number, color and size. Below is what a UPC would appear as on a linear and numeric level.
UPC values can be applied to each product at the size level on Product Data files.
Vertical Format Product Data files will have a 'UPC 1' column and each row will contain a different size level's UPC value.
Horizontal Format Product Data files will have 'UPC 1', 'UPC 2, 'UPC 3' etc. for each size of a product. All the size level's UPC values for a product will be on the same row.
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