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

id type: Any combination of letters, numerals, \"-\" and \".\", with a length limit of 64 characters. (This might be an integer, an unprefixed OID, UUID or any other identifier pattern that meets these constraints.) Ids are case-insensitive.
Base: http://hl7.org/fhir/StructureDefinition/string4.0.1, 5.0.0, 4.0.1
Type: id (a.k.a: http://hl7.org/fhir/StructureDefinition/id)
Type dependencies: 1
Elements