* 4347 Product id. function qualifier [B] Desc: Indication of the function of the product code. Repr: an..3 1 Additional identification Information which specifies and qualifies product identifications. | 2 Identification for potential substitution The item number describes the potential substitute product. 3 Substituted by The given item number is the number of the product that substitutes another one. 4 Substituted for The given item number is the number of the original product substituted by another. 5 Product identification Self explanatory. 6 Successor product id Product id of the product that will follow the one currently in production/trade. 7 Predecessor product id Product id of the predecessor of the product currently in production/trade. 8 Expired/out of production The given item number is the expired item number of the product. It has been replaced. 9 Deletion of secondary identification Code indicating the deletion of a secondary identification.