description: An extra warning about the correct use of the value set. package_name: rs/hl7.fhir.r2b.core derivation: constraint name: Extra warning about the correct use of the value set type: null elements: extension: isModifier: false name: extension mustSupport: false maxLength: 0 base: {max: '0', min: 0, path: Extension.extension} isSummary: false index: 0 url: isModifier: false pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-warning'} type: uri mustSupport: false maxLength: 0 base: {max: '1', min: 0, path: Extension.url} isSummary: false index: 1 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} isSummary: false maxLength: 0 isModifier: false mustSupport: false choices: [valueMarkdown] index: 3 valueMarkdown: isModifier: false index: 4 type: markdown mustSupport: false maxLength: 0 base: {max: '1', min: 0, path: 'Extension.value[x]'} choiceOf: value isSummary: false package_version: 1.4.0 extensions: {} class: datatype kind: datatype url: http://hl7.org/fhir/StructureDefinition/codesystem-warning base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [value, valueMarkdown]