Re: Re:

From: Paul Vernon <paul.vernon_at_ukk.ibmm.comm>
Date: Tue, 11 Feb 2003 09:54:54 -0000
Message-ID: <b2ahc8$oqm$>

"The Oyster" <> wrote in message
> Sorry for my bad English, probably I didn't explain well what it's my
> problem.
> I know how to choose and put relationships in a E-R diagram
> (I use ERWIN 4.1).
> The point is : how to set "attributes" in a relationship?
> Attributes are well defined in the theory of database design as
> "properties" of entities and relationships.
> In ERWIN is very easy to set attributes for entities;
> unfortunately it seems to be not so easy (perhaps impossible at all)
> for relationships.

Despite it's name, ERWin does not do ER models (not necessarily a bad thing IMO). It does

    Integration DEFinition for Information Modeling (IDEF1X) notation and

    Information Engineering (IE) notation

If anyone knows, I'ld be interested in the history of these notations and how they relate to Chen's original.

Paul Vernon
Business Intelligence, IBM Global Services Received on Tue Feb 11 2003 - 10:54:54 CET

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