Illness does not keep office hours. The practice ensures that care is available to its patients when it is closed, by providing it directly, by a cooperative arrangement with other practices, or by a formal agreement with an accredited medical deputising service, and that the after-hours provider reports back on care given so the record stays complete. Patients are told, in the practice information, on the website and on the phone message, how to reach after-hours care and when to call 000.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.