Re: Another view on analysis and ER

From: Jon Heggland <>
Date: Fri, 07 Dec 2007 09:42:27 +0100
Message-ID: <fjb12b$jnt$>

Quoth rpost:

> David Cressey wrote:

>> Bingo! That's the big problem with the literature on ER. Many ER
>> proponents use ER as if it were a design artifact. I think that 's a
>> misapplication of the artifact, and I'm pretty sure Peter Chen would agree.
>> If one is designing a relational system (including but not limited to a
>> relational database) then using the relational model to capture the design
>> is a much better idea.
> Well, that reflects what "we" teach: make a model in ER then convert it
> into a logical relational design.  I thought it was how ER is *always* used.

But this conversion is fairly mechanical. Is "design" in this case just the little bit of human input that enters this process?

Received on Fri Dec 07 2007 - 09:42:27 CET

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