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

string Type: A sequence of Unicode characters

element_id	types
string
string.value	http://hl7.org/fhirpath/System.String
string
string.id	http://hl7.org/fhirpath/System.String
string.extension	Extension
string.value	http://hl7.org/fhirpath/System.String