>Jim,
>
>>There is no product on the market that meets Codd's rules completely. Some meet more of them than others and xBase is somewhere at the bottom of the list on this point.
>
>As far as I know SQL is not number 1 on this list too.
>

For the record, SQL is not a product, it's a standard implemented by a number of products on a number of platforms.

Walter, it's truly amazing the number of people with years of experience with a plethora of database products, that use a number of different forms of database, that you maintain don't understand the relational model. Is it possible that they do and you are sadly mistaken?