Hello,
i would like to ask what way do you use to depict exclusive relation in ERD diagram of VP?
I want to portray this visually (without a need of writing something to documentation).
I think that this is very important thing for conceptual modeling and I was unpleasantly surprised that I don´t able
to find solution of this problem by easy way.
The following diagram indicates that each convict is assigned to a prison, or to a parole officer, but not both:
http://img716.imageshack.us/img716/7409/exclusiveor.jpg
other example
The same problem is about relations of subtype-supertype (ISA relation)…
Thank you for answer.
Have a nice day!
