description: 'If true, indicates that in a JSON representation, the indicated child element is the json property key for the value. Implies that this is a property with max = * that has two children, one of which is the key and the other is the value ' package_name: hl7.fhir.uv.tools.r4 derivation: constraint name: JsonPropertyKey type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/tools/StructureDefinition/json-property-key'} type: uri index: 1 value: choices: [valueCode] index: 3 valueCode: {type: code, choiceOf: value, index: 4} package_version: 0.6.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/tools/StructureDefinition/json-property-key base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.6.0 required: [value, valueCode]