Re: atomic

From: David Cressey <cressey73_at_verizon.net>
Date: Fri, 02 Nov 2007 18:59:59 GMT
Message-ID: <PsKWi.24$bm.3@trndny08>

"paul c" <toledobythesea_at_ooyah.ac> wrote in message news:08HWi.167005$Da.137917_at_pd7urf1no...
> David Cressey wrote:
> > "paul c" <toledobythesea_at_ooyah.ac> wrote in message
> > news:DetWi.165783$Da.130771_at_pd7urf1no...
> >> Bob Badour wrote:
> >>> paul c wrote:
> >> ...
> >>>> I'm wondering are there applications where RVA values that are
"empty"
> >>>> make sense or are such values just a curious by-product of RVA's?
> >>> Yes, of course, there are lots of such applications (assuming RVAs
make
> >>> sense.)
> >>> ...
> >> For example?
> >
> > The set of toppings on a pizza.
> >
> >

>

> If I may dodge the ordering question for now and continue with my casual
> graphics, how could a relation like the following be useful?
> (assuming one pizza per order and ignoring pizza size)

>

> PizzasOrdered:

>

> Order {Toppings}
> _____ __________

>


> 1     {Tomato, Sausage, Cheese}

> 1     {}

>
>

You are presenting us with some data,  and then asking what it means.  Why

not tell us what it means, and then maybe one if can figure out if the representation is a useful one.

Also, how does the example you gave us differ from:

> Order {Toppings}
> _____ __________

>


> 1     {Tomato, Sausage, Cheese}

> 1     {Pepperoni}


Lastly,  I regard tomato suace and cheese as an essential part of the pizza,

and not a "topping" as such. I realize that this is quite subjective. But I claim that, if you order a pizza with no toppings from Domino's, that this is what you will get: crust, tomato sauce, and cheese. Received on Fri Nov 02 2007 - 13:59:59 CDT