Re: Object-relational impedence

On Thu, 6 Mar 2008 14:58:35 +0000, Eric wrote:

> I have not deduced data existence from anything, I simply believe it to
> be a fact.

I see, it is a theological issue then. You are free too believe in what you want. That is out of my interest.

>>>> In OO problems are not modeled in terms
>>>> of applications using data.
>>> 
>>> No, but the data is still there.
>>
>> In which sense? Laplace has answered this two hundred years ago: "I did not
>> need to make such an assumption."

He meant beliefs.

> What is your definition of "data"?

I don't need it defined. But if you ask it is

   _value_

Specifically, one of some *built-in* type. A low-level abstraction concept typical to early universal purpose programming languages without ADTs, like FORTRAN. Data are aggregated mechanically without further abstraction.

Contemporary use examples are data-oriented domain-specific 4GL, like SQL (data query), Simulink (signal processing). Weak point is presumption of equality of the domain entities and the computational objects and thus 1) built-in types, 2) deduced algorithms from a narrow set (indexing in RDBMS, equation solving in Simulink). This is also the criterion of applicability of a given data-oriented language.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de