description: Explanation of why this artifact is needed and why it has been designed as it has. package_name: hl7.fhir.uv.extensions.r3 derivation: constraint name: ArtifactPurpose type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/artifact-purpose'} type: uri index: 1 value: choices: [valueMarkdown] index: 3 valueMarkdown: {type: markdown, choiceOf: value, index: 4} package_version: 5.3.0-ballot-tc extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/artifact-purpose base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.3.0-ballot-tc required: [value, valueMarkdown]