Optional_Optionalcanyes | no | undetermined
OptionalcommunicationMethod for exchanging information with the primary source
OptionalextensionAdditional content defined by implementations
OptionalidUnique id for inter-element referencing
OptionalmodifierExtensions that cannot be ignored even if unrecognized
Optionalpushspecific | any | source
OptionaltypeType of primary source (License Board; Primary Education; Continuing Education; Postal Service; Relationship owner; Registration Authority; legal source; issuing source; authoritative source)
OptionalvalidationWhen the target was validated against the primary source
Optionalvalidationsuccessful | failed | unknown
OptionalwhoReference to the primary source
When the target was validated against the primary source