Re: Operationalize orthogonality


"U-gene" <grigoriev-e@xxxxxxxxx> wrote in message
news:1148976501.079061.75470@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

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


.

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