Re: From class diagram to physical data model : conceptual data model or not ?

On May 29, 11:53 am, zejea..._at_gmail.com wrote:
> Hello,
>
> Our developers use UML and make class diagrams (A).
>
> Our DBA team wants to make physical diagrams with powerdesigner (B).
>
> >From (A) to (B) we can :
>
> - create a data model diagram (ER) and derive it in its physical form
>
> - or directly create the physical diagram provided the class diagram
> is complete
>
> After all, what is the point of making an ER conceptual diagram when
> the class diagram so much resembles it.
> (entity <=> class, ...)
>
> What would be your advice ?
>
> This is certainly a naive question ... don't be too harsh =)
>
> Thanks in advance
>
> Jean-Michel

ER diagrams are DBMS independent, whereas class diagrams are DBMS dependent. ER model gives you high level picture of your design and changes are easily acceptable. Received on Fri Jun 01 2007 - 16:06:57 CEST