Re: Does Codd's view of a relational database differ from that ofDate&Darwin?[M.Gittens]

Marshall Spight wrote:
>
> I'm still wildly unclear as to what this all means, but
> I got a hint from the above line.
>
> Is the word "abstract" here being used in the same sense that
> is in Java? Meaning roughly: uninstantiable with parts of the
> definition to be filled in at a later time?

No, not really. It has to do with the distinction between on the one hand houses, people and countries and on the other hand strings, numbers and booleans. The latter three can be denoted directly, the first three only indirectly by denoting a certain combination of values associated with them.

• Jan Hidders