Is there any modeling tool that provides diagrammatic support in pure Chen
notation?
"Paul Vernon" <paul.vernon_at_ukk.ibmm.comm> wrote in message
news:b2ahc8$oqm$1_at_sp15at20.hursley.ibm.com...
> "The Oyster" <the_oyster_at_libero.it> wrote in message
> news:ffdcf1a657981b3f9cbc56f60d3b7d65.46970_at_mygate.mailgate.org...
> > 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.
>
> Regards
> Paul Vernon
> Business Intelligence, IBM Global Services
>
>
>
Received on Tue Feb 11 2003 - 23:18:52 CST
