uuid

Base StructureDefinition for uuid type: A UUID, represented as a URI

Primitive data type in FHIR R4. Maturity: Not stated.

Elements

Element	Type	Cardinality	Description
id	string	0..1	xml:id (or equivalent in JSON)
extension	Extension	0..*	Additional content defined by implementations
value	string	0..1	Primitive value for uuid

Reference

Official FHIR R4 specification: uuid.