As with building blocks, two types of elements coexist within this classification: the “architecture” part and the “solution” part, with the latter being the physical translation of the former. For example, the specification of a workflow tool will be positioned in the “architecture” part, which describes the functions, use modes, and components that a tool of this category must provide. Conversely, a marketplace tool recommended by the enterprise will be found in the “solution” part. In this way, we end up with a double classification plan, illustrated in Figure 4.3.