Identifier
Alphanumeric token that identifies this resource and information about the token's originating context or scheme.
Where a specific property for the originating context or scheme exists, such as ceterms:opeID, ceterms:ncesID, ceterms:leiCode, etc., use that property instead of this one. Where the identifier has no nameable originating context or scheme other than that of the resource being identified, ceterms:codedNotation may be used.