Re: Objects and Relations
Date: 15 Feb 2007 09:05:59 -0800
Message-ID: <1171559159.821354.217860_at_p10g2000cwp.googlegroups.com>
Sigh. Let me take you back to what you initially wrote Cimode:
Cimode wrote:
For a legoBlock, location is perfectly acceptable as an identifier. It
is unstable, and so potentially a bad design choice, but still
perfectly valid identifier at any instant. My complaint at what you
> >>What I meant is that LegoBlock
> >>and Location concepts should be separated if LegoBlock is to be
> >>considered a relation. A relation *must* have a stable primary key.
> >>Location is not a stable primary key therefore it does not identify
> >>LegoBlock.
>> Please be sincere.
I assume that you will show the same sincerity in acknowledging that
bad design choice != contravening RM.
Received on Thu Feb 15 2007 - 18:05:59 CET