Clause 7.4 defines the pharmaceutical product identifier, the PhPID. The identifier is not a product code issued by one regulator. It is a value built from the identifying characteristics at a chosen level, so that products with the same composition can be associated even when they carry different national authorisation numbers. The clause follows the strata and levels, cardinality and strength representation because those are its inputs. It precedes the stratum element clauses because those clauses describe what goes into each level. The public contents give the title and position but not the body. The exact construction algorithm and the character rules are not stated in the text we hold. The public FDA material describes the PhPID as an identifier calculated from substance identification, dose form and strength, and as the means of linking similar products across regions.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.