What data does the EPC provide a "key" to?

Similar to existing barcoding systems the EPC number is just that, a number. This EPC number can be tied to data, with additional information, through technology currently in use within the barcode industry.

For example, Electronic Data Interchange (EDI) can be used to transmit detailed information on product being shipped from a manufacturer to a retailer. The product detail could include size, color, lot number, date of production, type and quantity information. The shipment itself (carton or pallet) would be identified with an EPC number, corresponding to the shipment detail provided via EDI. The EPC number itself doesn't tell you color, size, etc.; the number is the key to data stored elsewhere with this information. This shipping identification process is very similar to that in place today via the UCC/EAN-128 barcode.

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