http://hl7.org/fhir/StructureDefinition/Distance|4.0.1

Base StructureDefinition for Distance Type: A length - a value with a unit that is a physical distance.

element_id	types
Distance
Distance
Distance.id	http://hl7.org/fhirpath/System.String
Distance.extension	Extension
Distance.value	decimal
Distance.comparator	code
Distance.unit	string
Distance.system	uri
Distance.code	code