Elements in one can relate to elements in another so while it is helpful to consider each separately, it is also necessary to reason rigorously about the interrelations of these views. Whether the structures describe the product, the process of building the product, or the process of using the product to solve a problem. All the views discussed in this section are of the product. A model of the user interaction presents another view of the architecture of the system, and is typically represented via entity-relation diagrams. Still other views model the problem area or domain.
Some authors differentiate views by what kind of information they show.
These all map, more or less, to the previous two categories. Note that each view may be interpreted either as a description of the system that has been built, or a prescription that is engineered to achieve the relevant quality attributes. There is not yet agreement on a standard set of views or terms to refer to views. In this section we list a typical and useful set. It should be noted that these views are given different names by various technologists.