Portable handheld items used where product is open, such as stationery, mobile phones and tablets, must be controlled so that physical contamination is kept to a minimum; for example, items that are not approved may be kept out, only equipment issued by the site may be allowed, or pens may be required to be detectable and free of small parts.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.