description: 'R4: `Evidence.effectivePeriod` (new:Period)'
package_name: hl7.fhir.uv.xver-r4.r3
derivation: constraint
name: ExtensionEvidence_EffectivePeriod
type: Extension
elements:
  url:
    base: {max: '1', min: 1, path: Extension.url}
    pattern: {type: Uri, value: 'http://hl7.org/fhir/4.0/StructureDefinition/extension-Evidence.effectivePeriod'}
    index: 0
  value:
    short: When the evidence is expected to be used
    choices: [valuePeriod]
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    index: 2
  valuePeriod:
    short: When the evidence is expected to be used
    type: Period
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    choiceOf: value
    index: 3
package_version: 0.1.0
class: extension
kind: complex-type
url: http://hl7.org/fhir/4.0/StructureDefinition/extension-Evidence.effectivePeriod
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.1.0
required: [url]