Optional_OptionalageApplicable age range, if relevant
OptionalappliesReference range population
OptionalextensionAdditional content defined by implementations
OptionalhighHigh Range, if relevant
OptionalidUnique id for inter-element referencing
OptionallowLow Range, if relevant
OptionalmodifierExtensions that cannot be ignored even if unrecognized
OptionaltextText based reference range in an observation
OptionaltypeReference range qualifier
Text based reference range in an observation