ISO/IEC 27002:2013, 12.4.1 is augmented for communities: where the community requires it, members keep a log of how shared information is circulated inside their own organization, so that who inside a member received or forwarded an item can be established, in addition to the ordinary event logging of the sharing facility.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.