Once a need to convey information that is essential to proper use of a device by means of a symbol has been identified, that information is shown on the device, on its packaging or in the information the manufacturer supplies by using the corresponding symbol from Table 1; the manufacturer remains free to use other suitable symbols as well, and symbols from other standards for particular device types sit alongside these.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.