Re: Domain

"Peter Koch Larsen" <pkl_at_mailme.dk> wrote in message news:3ff7ed4a$0$149$edfadb0f_at_dread11.news.tele.dk...
>
> "Bob Badour" <bbadour_at_golden.net> skrev i en meddelelse
> news:mfGdnV-2Nadl2mqiRVn-vA_at_golden.net...
> > "Adrian Kubala" <adrian_at_sixfingeredman.net> wrote in message
> > news:slrnbve73f.ta3.adrian_at_sixfingeredman.net...
> > > Bob Badour <bbadour_at_golden.net> schrieb:
> > > > As long as the dbms treats values strictly as values at the logical
> > > > level, all values are atomic. A dbms would violate atomicity if it
> > > > exposes internal structure with concepts such as a current position
> > > > within the value, for instance.
> > >
> > > I don't think it's so clear-cut. What's the difference between a
> > > function "value -> current position within value" and a function "date
> > > -> month"?
> >
> > Month is a derivable value from any date value. Since values have no
> > locations, a current position within a value is an absurdity.
> >
> >
> > > What if cons cells were used for all non-scalar types. Would
> > > car and cdr "expose internal structure"?
> >
> > Since there are no non-scalar types, I have difficulty finding any
meaning
> > in your question.
> >
> >
> What about "what is the value of the fourth character in the last name"?

What about it? Are you suggesting strings are non-scalar? What about the third bit in the integer? Received on Sun Jan 04 2004 - 11:59:54 CET