Re: Objects and Relations

Bob Badour <bbadour_at_pei.sympatico.ca> wrote:

>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.

     It could be in a suitable domain. One would be if the locations are limited to being in Lego constructions.

Sincerely,

Gene Wirchenko

Computerese Irregular Verb Conjugation:

     I have preferences.
     You have biases.
     He/She has prejudices.