Enum name (all UPPERCASE)
A string pattern that identifies a concept as defined by the code system
OptionalsystemA URI that identifies the system
OptionaldisplayA description of the concept as defined by the code system
OptionaldefinitionAdditional descriptive information about the code
the 'code' for this FHIR code definition
Base FHIR code system definition for a particular code defined in an implementation of IFhirCodeEnum.