Well, I can think of it like an OSI layers - there actually isn't too many implementations, but it helps to understand network transmission. I think the article has a good education value in this aspect.
H.Ozawa --- In [email protected], "Steve Jones" <[EMAIL PROTECTED]> wrote: > > What I'm saying is that for post-transactional data there aren't > "layers" there is really only one layer and that is the provision of > information to consumers. As you say this comes from multiple sources > but there isn't really a set of layers, its just post-transactional > store and how people access it. > > My other point is that doing this data abstraction works for > post-transactional data. Relational folks normally try and apply it > elsewhere (IME) and it doesn't work. >
