There are many different ways of using RFID tags. The one that everyone seems to be latching on to here is the EPC or electronic product code that came out of the AutoID center's work. Traditionally, EPC has focused on WORM style tags and this would probably be the case for use in retail (although again, this is just one of the possible application areas).
You seemed to indicate that it would be necessary to "look up" the product code based on the EPC but in fact the product code (or more strictly the SKU) will probably form part of the EPC.
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There are many different ways of using RFID tags. The one that everyone seems to be latching on to here is the EPC or electronic product code that came out of the AutoID center's work. Traditionally, EPC has focused on WORM style tags and this would probably be the case for use in retail (although again, this is just one of the possible application areas).
You seemed to indicate that it would be necessary to "look up" the product code based on the EPC but in fact the product code (or more strictly the SKU) will probably form part of the EPC.
You can read more about it on the AutoID Labs whitepapers page.