Re: Objects and Relations
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Thu, 15 Feb 2007 18:16:47 GMT
Message-ID: <js1Bh.6851$R71.102960_at_ursa-nb00s0.nbnet.nb.ca>
Date: Thu, 15 Feb 2007 18:16:47 GMT
Message-ID: <js1Bh.6851$R71.102960_at_ursa-nb00s0.nbnet.nb.ca>
Marshall wrote:
> On Feb 14, 6:38 am, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:
>
>>JOG wrote:
>>
>>
>>>1) Lego blocks are /not/ the same. They always have a different
>>>location attribute.
>>>2) Hence their x,y,z position attribute always identifies them.
>>>3) However this identifer is very hard to record and keep track of,
>>>even though it exists.
>>
>>To amplify, the location might be familiar and perhaps even unique, but
>>it is neither simple nor stable.
> > As an aside, there exist domains where location is stable. GIS systems > come to mind, or driving directions software.
Location is a stable identifier for a point in some space. It is not a stable identifier for a lego piece. Received on Thu Feb 15 2007 - 19:16:47 CET