Re: MV Keys

From: Marshall Spight <marshall.spight_at_gmail.com>
Date: 1 Mar 2006 18:50:29 -0800
Message-ID: <1141267829.869557.170030@t39g2000cwt.googlegroups.com>

David Cressey wrote:
> "Marshall Spight" <marshall.spight_at_gmail.com> wrote
>
> > To my current way of thinking, there are only the two compound types:
> > list and set.
>
> A tuple is a compound type. And I don't think a tuple is either a list or a
> set.

An n-ary tuple is an n-ary relation whose cardinality is constrained to be exactly 1. Lots of people hate this idea, but it seems to work very well.

Marshall Received on Wed Mar 01 2006 - 20:50:29 CST