"Laconic2" <laconic2_at_comcast.net> wrote in message
news:8p6dnd1z4OqsBwvd4p2dnA_at_comcast.com...
> I looked over the Codd paper over the weekend. In the paper, Codd
> distinguishes between "RELATIONS" and "RELATIONSHIPS".
>
> I don't the the difference between what Codd called a "relationship" in
> that paper and what Peter Chen called a "Relationship" when he introduced
> the E-R model.
Interesting. I have read the Codd paper recently, but neer the Chen
introduction of the E-R model. I thought that the E's and R's in an ERD
were of the same ilk in that way -- so are both relations? What is the Chen
work that you read -- is there a URL to it? --dawn
Received on Mon May 03 2004 - 14:29:16 CDT
