Employees keep, even at work, the right to private life and secrecy of private correspondence. The employer may not freely read personal emails, even where personal use is prohibited; to be protected, messages must be identified as personal (subject marked personal or private, or stored in a folder so named); a folder named with initials or "my documents" is not enough. That protection ceases in a judicial investigation or where a judge authorises access (for example a bailiff appointed by the court). Files identified as personal are opened only in the employee's presence or after calling them, or where a particular risk or event exists.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.