New in V4.1.1: a non-web document must not block the viewer's modes that present it according to user preference settings, nor explicitly override the user's choices for documented platform accessibility features within those modes, unless essential; for documents the platform is the user agent, and a viewer meeting 11.7 enforces preferences in at least one mode.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.