The core language is organized into three layers: Business, covering services offered to customers and realized by processes performed by actors; Application, covering application services and the applications that provide them; and Technology, covering processing, storage and communication services plus the hardware, system software, physical equipment and distribution networks that realize them. Cross layer links are mainly serving relationships, and lower layer elements may realize similar elements at a higher layer.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.