Re: Proposal: 6NF

From: David Cressey <dcressey_at_verizon.net>
Date: Sat, 14 Oct 2006 18:19:11 GMT
Message-ID: <zS9Yg.224$AR6.74@trndny02>

"vc" <boston103_at_hotmail.com> wrote in message news:1160752928.197097.241340_at_m73g2000cwd.googlegroups.com...

> RIght, but my understanding of the OOP stuff leads me to believe that
> a subtype should '"inherit" its type operations. If so, assuming R is
> our base type, what do we do about division in Z (regarded as an R
> subtype) ;) ?

My understanding is that a subtype inherits type operations unless overridden or forbidden.

Also, are we really talking "subtype" or are we talking "subset"? Received on Sat Oct 14 2006 - 13:19:11 CDT