Doorways on the path must give a clear opening of at least 850 mm, measured between the open door's face and the doorstop (across the active leaf for a pair of doors), and the door reveal to the door face may be no deeper than 300 mm in any situation (a 2021 addition). The 2021 figures cover swing, cavity sliding, surface-mounted sliding and pivot doors.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.