http://hl7.org/fhir/StructureDefinition/integer64|5.0.0

{description: 'integer64 Type: A very large whole number', derivation: specialization, name: integer64, type: integer64, class: primitive-type, kind: primitive-type, url: 'http://hl7.org/fhir/StructureDefinition/integer64', base: 'http://hl7.org/fhir/StructureDefinition/PrimitiveType', version: 5.0.0}