Re: Operationalize orthogonality

"U-gene" <grigoriev-e_at_yandex.ru> wrote in message news:1148976501.079061.75470_at_i40g2000cwc.googlegroups.com...

> It's a good question. Analogy from physics, where ratio has no
> dimensionality at all, can be not applicable for DB.

How you measure lengts in meters ?

> To get weight which is twice more than given weight we multiply the
> last one by 2. Here units of "2" may be called as "times" :) . And we
> can use reverse operation to get this "times" dividing one weight by
> second one.

:-)

> But anyway my previous remark is not about units but only about
> sensible possibilities to divide one weight by other one. As I
> understand we have to define all sensible operations *on* domain ever if
> units of their results are different that units of operands -
> otherwise users will not get some information what can be helpful.

There are two kinds of operations:
- internal
- external Received on Tue May 30 2006 - 11:43:46 CEST