Identifier - Unique and resolvable identifier containing the notation and identifier scheme in the form of URI. value - Value of the identifer within the given identifier scheme. in scheme - Relation between the identifier and scheme in which it is defined and unique. authorized - Specifies whether the identifier is authorized by the subject it represents. This attribute shall be filled mainly for ORCiD identifiers of Persons. It serves to determine whether the person in the repository is really the person it is meant to be.