description: This cross-version extension represents HealthcareService.publicKey from http://hl7.org/fhir/StructureDefinition/HealthcareService|1.0.2 for use in FHIR R4B. package_name: hl7.fhir.uv.xver-r2.r4b derivation: constraint name: Ext_R2_HealthcareService_publicKey type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-HealthcareService.publicKey'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: PKI Public keys to support secure communications choices: [valueString] index: 2 valueString: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: string short: PKI Public keys to support secure communications choiceOf: value index: 3 package_version: 0.0.1-snapshot-2 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-HealthcareService.publicKey base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0 version: 0.0.1-snapshot-2 required: [url]