Re: The Network Data Model

> > the forms of the hierarchical and network model databases
> > existed prior to 1970.
>
> Obviously. The point is that they are post-facto abstractions
> taken from implementation, not something designed.

It doesn't look that way to me. It seems clear that the CODASYL DBTG was working on "the network model" throughout its task, starting in 1969. Whether they called it that, or something else, I don't know.

But it's clear that they were arriving at a model, not an individual implementation. The great databases of the 1970s were all CODASYL style. As such, they implemented the network model of data, whether they called it that or not. Received on Fri Apr 23 2004 - 18:49:39 CEST