Re: Codd provided appropriate mathematics ... (was Re: Relational and MV (response to "foundations of relational theory"))

As an aside in this discussion, I've seen "multivalued" defined 2 different ways in explanations of relational (some of which are really bad).

1. Where attribute A can hold a list of values (type LIST)
2. Where there are attributes A1, A2, A3, A4 (for example), all of the same type and meaning. For example, ADDR1, ADDR2, etc.

Does 1NF refer to both of these? If not, what's the proper terminology for each of these cases? Received on Thu Feb 26 2004 - 12:42:24 CST