Re: Database-valued attributes?

"Bob Badour" <bbadour_at_golden.net> wrote in message news:EZKdnUmgA62gjiyiRVn-tw_at_golden.net...
> "Paul Vernon" <paul.vernon_at_ukk.ibmm.comm> wrote in message
> news:boquvj$1o30$1_at_gazette.almaden.ibm.com...
> > "Bob Badour" <bbadour_at_golden.net> wrote in message
> > news:srWdneQR1as5SC2iRVn-hg_at_golden.net...
> > > All you have done is describe a data type with a possrep consisting of
> two
> > > RVA's. Such a data type is perfectly acceptable. The equivalent of a
> > > "database value" with multiple views would be a similar type with
> multiple
> > > possreps.
> >
> > Q. Do D&D explicitly define what a possiable representaion is. I.e. is a
> > poss rep with more than 1 component a tuple of those components, or a
> list, a set, an array or just 'a thing with components'?
>
> It is a possible representation. The remainder is internal.

Thanks.

Can't say I'm happy with such dereliction of definition though. I'd like to see the logical model cover such matters rather than leaving it to be an 'internal' matter. Oh well.

Regards
Paul Vernon
Business Intelligence, IBM Global Services Received on Wed Nov 12 2003 - 11:50:00 CET