Coded Notation
Set of alpha-numeric symbols as defined by the body responsible for this resource that uniquely identifies this resource and supports its discovery and use.
Examples include course codes (e.g., "ENG101"), US Standard Occupation Codes (e.g., "31-9091"), North American Industry Classification System codes (e.g., "236117"), or any other bespoke code used by the provider of the resource to identify it.
For identifiers that come from a recognized identification scheme use the specific property for that identifier type, such as ceterms:opeID, ceterms:ncesID, ceterms:leiCode, etc., or use ceterms:identifier so that the identification schema can be named.