Re: Key attributes with list values was Re: What are the differences ...KEY

>> With those propositions, you can't, of course. Declaring name as the key
>> is declaring that two people with the same name *are* the same person. Or
>> perhaps more accurately, a table with person-names as the key is a table
>> of names, not a table of people. Since names can't have a marital status,
>> trying to map the table's attributes back to the real world breaks down.

Agree. Regardless of being a surrogate or not, keys provide logical identity and it makes little sense to talk about any kind of constraints without them.

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Anith