On 4 Oct 2013, at 15:45, Peter Hunsberger wrote:
Hi Michael,
I think you're being a bit unfair here. I'd read that as "The introduction of the relational data model had invigorated the interest in Entity Relationship Modeling"....
Well I guess it's written from a US perspective, where ER modelling caught on rather later than in the UK (using Chen notation rather than crow's foot notation, and other differences like allowing relationships to have attributes). But I think it was the ANSI-SPARC 1975 report that stimulated interest in "conceptual modelling", it wasn't the move to relational database technology. Very few people outside academia were interested in relational databases in 1975.
