Re: One-To-One Relationships

From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Sun, 02 Dec 2007 11:15:07 -0400
Message-ID: <4752cbff$0$5277$9a566e8b@news.aliant.net>

Jan Hidders wrote:

> On 1 dec, 01:13, JOG <j..._at_cs.nott.ac.uk> wrote:
>

>>On Nov 30, 9:36 pm, Jan Hidders <hidd..._at_gmail.com> wrote:

[snip]

>>>If the distinction is not useful and in
>>>fact bad for data modeling then this should somehow become apparent
>>>when you start working with such data models.
>>
>>But it is very apparent Jan. A testament to that are the hundreds of
>>students I have encountered who end up very confused at the logical
>>layer because of it (and their pre-indoctrination in OO), dropping the
>>subject area as a result.

>
> Actually the problem is with OO is the same as with the RM, but at the
> other side of the spectrum. In OO the notion of entity is assumed to
> be central, in RM the notion of relationship is. Both are wrong.

I disagree with the latter assertions. The central notions of the RM are predicates, propositions and proofs.

[snip] Received on Sun Dec 02 2007 - 09:15:07 CST