description: Specifies additional guidance for determining how the allocation for the measure specification should be performed. package_name: hl7.fhir.us.cqfmeasures derivation: constraint name: PopulationBasis type: Extension elements: url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/us/cqfmeasures/StructureDefinition/cqfm-allocation'} index: 0 value: choices: [valueMarkdown] index: 2 valueMarkdown: {type: markdown, choiceOf: value, index: 3} package_version: 1.1.0 class: extension kind: complex-type url: http://hl7.org/fhir/us/cqfmeasures/StructureDefinition/cqfm-allocation base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.1.0