The building block model consists of the generic entities building block and catalog. These form the basis of a reference architecture. Catalogs are groupings of building blocks within a specific domain. Multiple catalogs will be created that are related to each other and overlap within the visualizations. The advantage of the design of working with catalogs and building blocks is:

• Registers are created of reusable architectural components aimed at a specific field of work.
• The use of building blocks brings standardization and encourages reuse of architectural configurations.
• Building blocks makes the architecture and development process easier.
• Architectural product catalogs aimed at specific professional fields are being developed. This has a positive influence on the service provided to the rest of the organization.

The building blocks have three specializations, the definitions of which have been worked out in detail. These descriptions are elaborated in the paragraphs below. If relevant, additional information has been added to this elaboration, such as links to Togaf and examples of the implementation of these architectural concepts The model uses a pragmatic model with regard to the associations between Service and SBB. From ArchiMate perspective, the route from service is via ABB to SBB. This is characterized by the fact that the functional aspect is well embedded in the building block model. When publishing these models, a possibility is sought to generate reports and web pages that do not contain data relevant to the model for non-architecture stakeholders, which may mean that in a number of situations the ABBs do not have to be developed. Applying the direct association between service and SBB in the modeling does not meet the viewpoints.