> why try and encode all that information in the first place?
> its rf ID not rf encyclopedia.
> 1024bits worth of ID should probably cover every possible product that
> could be sold You then have a database with the product ID's against the
> items. Fruit+veg etc go into the bag, the sales person says this bag has
> carrots in it. The computer takes the weight of carrots, and the fact
> that it is carrots and sticks that item in the database.
> When you get to the checkout your cart is read, That ID is pulled out
> and the fact you have 12.2354435kg of carrots is added to your total.
> You aren't going to make something programmable cheap enough to work.
> I'd wager a coke that any time somebody says they are "programming" a
> rfid tag when they wave it near the same device that reads the tag, that
> that is what is actually happening. They are just reading the tags value
> and telling the computer to associate this ID number with entity X.

The someone has to associate the tag to 12.235kg of carrots, it just happens 
in advance, so no labor is saved for the store. 


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