Moving records between systems or formats, which covers shutting down a system and scanning analogue material, is planned, written up and explained to stakeholders inside and outside. Getting rid of the source records afterwards needs approval; everything in the original system or format, content and metadata, is held back until the move is complete and the new home has been checked and secured for integrity and reliability, and external authorities may need to audit, authorise or certify the process.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.