Re: Relation or attribute and why

On 23 May 2006 18:08:29 -0700, "dawn" <dawnwolthuis_at_gmail.com> wrote:

>Gene Wirchenko wrote:

[snip]

>> Possibly fuzzy, but nonetheless.
>>
>> Conceptual might fit on a napkin: "We want an E-commerce Web site
>> for selling our products. It has to be able to handle North America,
>> but we plan to go international, so have the capability to add other
>> languages, etc. easily without rewriting large chunks. We want
>> someone able to complete an order quickly. Do not forget good
>> security. OtherCorp recently had a bad situation, and they are taking
>> a kicking. Now is our chance, if we do it right."
>
>Those are high level requirements, but not a conceptual data model.
>Conceptual, yes; CDM, no. You need at least an ORM, ERD, or a cleaner
>list of propositions related to these requirements, I would think.

     I did not claim it was. I said "conceptual model", as in the three: conceptual model, logical model, and physical model.

[snip]

Sincerely,

Gene Wirchenko Received on Wed May 24 2006 - 18:08:54 CEST