They are very similiar to class diagrams which are used outside of academia.
----- Original Message -----
From: "Tim Gorman" <tim_at_sagelogix.com>
To: <oracle-l_at_freelists.org>
Sent: Saturday, February 07, 2004 2:55 PM
Subject: Re: Academic ERDs vs. Professional ERDs
> If it is not used outside of academia, then it is either ahead of its time
> (due for general adoption) or of absolutely no practical use whatsoever.
>
> Given that decision-tree, how long have these concepts been around? I'm
> sure the footnotes have dates... :-)
>
>
>
>
> on 2/7/04 9:47 AM, Ryan at ryan.gaffuri_at_cox.net wrote:
>
> > I'm taking academic database classes and last semester we covered
academic
> > ERDs. The material in the book discussed 'entity sets' and relationship
sets.
> > The relations between them seemed very similiar to relations in a class
> > diagram.
> > However, I when I look into Erwin and Designer the ERDs there seem to be
> > closer to table models. Does anyone use the academic type of ERDs
> > professionally?
> >
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Received on Sat Feb 07 2004 - 15:13:41 CST
