Product Id and Product Id Ext.
You can now use the same unique productID
for two different products. Previously, a
unique productID
was assigned to each product.
You can differentiate the two products by using the PRODUCTIDEXT characteristic.
Example:
Product 1: Value of productID
is 'A' but has no PRODUCTIDEXT
Product 2: Value of productID
is 'A' and PRODUCTIDEXT is 1