description: Specifies the reporting period for the measure. package_name: hl7.fhir.uv.cqm derivation: constraint name: CQMEffectivePeriodDuration type: Extension elements: url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-effectivePeriodDuration'} index: 0 value: choices: [valueDuration] index: 2 valueDuration: {type: Duration, choiceOf: value, index: 3} package_version: 1.0.0-ballot class: extension kind: complex-type url: http://hl7.org/fhir/uv/cqm/StructureDefinition/cqm-effectivePeriodDuration base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0