The organisation defines how data is checked and corrected against predefined business rules, setting out the mechanisms, rules, processes and methods involved: it sets and maintains a data cleansing policy; it keeps a history of the changes that cleansing makes to data; it establishes and plans correction methods such as comparing several repositories, verifying against a valid source, checking logic, enforcing referential integrity and standardising; and service level agreements carry data quality criteria that make providers of data accountable for data once it is cleansed.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.