Fig. 14.1.7 shows that only granular data belong in the corporate data model.
Fig. 14.1.7 The corporate data model represents granular data only.The corporate data model represents the single version of the truth data in the
corporation. Corporate data are the place where everyone turns when they have to have
a reliable accurate answer.
One of the challenges is the fact that corporate data are usually fed by application data.
And application data are decidedly not the single version of the truth in the corporation.
For this reason, the interface between the application data model and the corporate data
model is important and needs to be carefully defined. The interface between the
application data model and the corporate data model defines an important transformation
of data. Once the interface has been rigorously defined, it is easy enough for the
programmer to write a program to accomplish the transformation.
Fig. 14.1.8 shows that multiple application models connect to the corporate data model.
Chapter 14.1: Data Models Across the End-State Architecture