description: Narrative text to explain the improvement notation and how to interpret it. package_name: rs/hl7.fhir.uv.extensions.r4 derivation: constraint name: CQFImprovementNotationGuidance type: Extension elements: url: type: uri pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/cqf-improvementNotationGuidance'} index: 0 value: choices: [valueMarkdown] index: 2 valueMarkdown: {type: markdown, choiceOf: value, index: 3} package_version: 5.2.0 class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/cqf-improvementNotationGuidance base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.2.0 required: [value, valueMarkdown]