http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-openLabel|4.0.0-ballot

The label text to display beside free-text and/or unrestricted type values for an 'open' choice element. E.g. 'Other, please specify', or 'Additional condition', or 'More reason(s)', etc.
Base: http://hl7.org/fhir/StructureDefinition/Extension4.0.1, 5.0.0, 4.0.1
Type: Extension (a.k.a: http://hl7.org/fhir/StructureDefinition/Extension)
Type dependencies: 0
Elements