Fig. 8.1.24 A star join.It was then recognized that a more formal treatment of data marts was needed than just
having dimensional models. The notion of the dependent data mart was then created.
Fig. 8.1.25 shows dependent data marts.
Fig. 8.1.25 The integrated analytical environment.The evolution that has been described did not happen independently. The evolution
happened concurrently. Indeed, the evolution to some levels of development depended
on evolutionary developments that occurred in other arenas. For example, the evolution
to online databases could not have occurred until the technology that supported online
Chapter 8.1: A Brief History of Data Architecture