A consultation is private, in a clinic or a lounge room. Before a student, a driver or chaperone employed by the service, another observer or an interpreter the service has arranged takes part in a consultation, the patient is told who the person is and why and is given a real chance to decline; the consent is recorded. Patients may have their own support person present without this process.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.