Re: Does Codd's view of a relational database differ from that ofDate&Darwin?[M.Gittens]

VC wrote:
> "Jan Hidders" <jan.hidders_at_REMOVETHIS.pandora.be> wrote in message
> news:ZmWye.138790$Kn.7314565_at_phobos.telenet-ops.be...
>

>>VC wrote:
>>
>>>>>So what's the difference between an object and a conceptual object ?
>>>>
>>>>A conceptual object is an object that is part of the universe of 
>>>>discourse that is under consideration.
>>>
>>> That's cool,  but what I was resally asking was what the difference 
>>>between an "object" and  the "conceptual object".  What is the word 
>>>"conceptual" doing here ?
>>
>>?? You mean, apart from indicating that this particular object belongs the 
>>universe of discourse? 

Ok. Let's call that set UoE, the universe of everything.

> You are saying that a "conceptual object" belongs to a
> universe of discourse, the universe being a synonym of a set, I hope. Now,
> my question is really simple: do an "object" and a "conceptual object"
> belong to different sets ?

Yes, "object" belongs to UoE and "conceptual object" belongs to UoD, the universe of discourse, which is a subset of UoE.

• Jan Hidders