Creating a GTIN for Trade Item Hierarchy

When creating a GTIN for Trade Item hierarchy, it is essential to first identify the Trade Item base unit GTIN. This will be the GTIN of the "Each" pack of the Item or the "single" Item generally sold at the retailer. Then when assigning GTINs to other hierarchical levels (e.g., case, pallet), you will have some basic options. Every individual hierarchical level will need a unique GTIN. This can be accomplished by creating a unique "indicator" (digit #1) or by assigning unique "item reference numbers" or by a combination of the two methods. While the "indicator digit" and "item reference number" are the only numbers that may be changed, there are no DEFINITIVE rules as to what those numbers must be in reference to.