description: Indicates how the calculation is performed for the group, including proportion, ratio, continuous-variable, and cohort. The value set is extensible, allowing additional group scoring types to be represented. package_name: hl7.fhir.us.davinci-deqm derivation: constraint name: DEQMGroupImprovementNotationExtension type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/davinci-deqm/StructureDefinition/extension-groupImprovementNotation'} index: 1 value: choices: [valueCodeableConcept] index: 3 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4} package_version: 4.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/davinci-deqm/StructureDefinition/extension-groupImprovementNotation base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.0-ballot