Hallo ,
I hoper I am on the right
thread.
I meet this term pretty often in the last time and I'am not shore about it.I try to explain it with an example.
I have a 3 tier application :
I.The data layer
II.The busines layer
III The presentation layer.
On I - data layer I defien the basic data operations live create,serach, delete, lock, unlock, etc.
The business layer warps the data layer in and transform the "unfriendly" data methods in to nice business methods.
The presentation layer use the business layer - model to show(presents) the
data.
So in the other words the data model/layer is the defines the system general purpose.
Am'I right ?