Re: Domain

I wrote:
What's the difference between a function "value -> current position within value" and a function "date -> month"?

Bob Badour wrote:
Month is a derivable value from any date value. Since values have no locations, a current position within a value is an absurdity.

and later wrote:
Since all values in an actual dbms are finite, I do not find this a useful distinction either.

So:
All values in an actual dbms also have some concrete representation, which have locations (or rather, within which one can name a location for each part of the representation, like a bit). So I still don't see why "current location" cannot be derived from any real value in the same way as month from date. Received on Tue Jan 06 2004 - 15:42:58 CST