Re: Nested Relations / RVAs / NFNF
From: Marshall Spight <mspight_at_dnai.com>
Date: Thu, 28 Oct 2004 02:00:46 GMT
Message-ID: <ipYfd.324263$3l3.156622_at_attbi_s03>
> So, could you have two distinct types that share a common domain? That is,
> they both have exactly the same
> possible values, with the same semantics, but they don't allow the same
> operations on them?
Date: Thu, 28 Oct 2004 02:00:46 GMT
Message-ID: <ipYfd.324263$3l3.156622_at_attbi_s03>
"Laconic2" <laconic2_at_comcast.net> wrote in message news:PuWdnYoANcjSbOLcRVn-qA_at_comcast.com...
>
> So, could you have two distinct types that share a common domain? That is,
> they both have exactly the same
> possible values, with the same semantics, but they don't allow the same
> operations on them?
You could, but you get more mileage if you don't. For example, if 2 feet and two meters have the same semantics, you've lost the distinction that caused you to put the units in in the first place.
Marshall Received on Thu Oct 28 2004 - 04:00:46 CEST