Re: Objects and Relations
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Sat, 17 Feb 2007 13:27:03 GMT
Message-ID: <HoDBh.7533$R71.114359_at_ursa-nb00s0.nbnet.nb.ca>
>
> I would like to claim that this very discussion reveals one
> of the advantages of trying to think without entities. It
> encourages us to think about the /problem/ instead. That is
> to think about our goals, our requirements, our knowledge,
> etc. It forces us to consider the facts at hand and those
> that may arise and design solutions for handling them.
>
> Is this part of what DB professionals do for a living?
Date: Sat, 17 Feb 2007 13:27:03 GMT
Message-ID: <HoDBh.7533$R71.114359_at_ursa-nb00s0.nbnet.nb.ca>
Keith H Duggar wrote:
>>Bob Badour wrote: >> >>>If you have x, y, z, deltaX, deltaY, and deltaZ you >>>won't need orientation. The location of a piece is >>>actually an interval >> >>Yes, because Lego blocks can only be rotated about the >>vertical axis z by 0,90,180,270 degrees. The interval >>approach also brings out their symmetry under rotation by >>180 degrees. Also square shaped blocks (deltaX = deltaY) >>are symmetric under rotation by 90 degrees.
>
> I would like to claim that this very discussion reveals one
> of the advantages of trying to think without entities. It
> encourages us to think about the /problem/ instead. That is
> to think about our goals, our requirements, our knowledge,
> etc. It forces us to consider the facts at hand and those
> that may arise and design solutions for handling them.
>
> Is this part of what DB professionals do for a living?
Yes.
> What lingo is used to describe this process?
'Thinking'. Received on Sat Feb 17 2007 - 14:27:03 CET