description: This cross-version extension represents EvidenceVariable.characteristic.participantEffective[x] from http://hl7.org/fhir/StructureDefinition/EvidenceVariable|4.0.1 for use in FHIR R4B.
package_name: hl7.fhir.uv.xver
derivation: constraint
name: Ext_R4_EvidenceVariable_ch_participantEffective
type: Extension
elements:
  url:
    base: {max: '1', min: 1, path: Extension.url}
    pattern: {type: Uri, value: 'http://hl7.org/fhir/4.0/StructureDefinition/extension-EvidenceVariable.characteristic.participantEffective'}
    index: 0
  value:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    short: What time period do participants cover
    choices: [valueDateTime, valuePeriod, valueDuration, valueTiming]
    index: 2
  valueDateTime:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    type: dateTime
    short: What time period do participants cover
    choiceOf: value
    index: 3
  valuePeriod:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    type: Period
    short: What time period do participants cover
    choiceOf: value
    index: 4
  valueDuration:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    type: Duration
    short: What time period do participants cover
    choiceOf: value
    index: 5
  valueTiming:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    type: Timing
    short: What time period do participants cover
    choiceOf: value
    index: 6
package_version: r4.r4b-0.0.1-snapshot-2
class: extension
kind: complex-type
url: http://hl7.org/fhir/4.0/StructureDefinition/extension-EvidenceVariable.characteristic.participantEffective
base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0
version: 0.0.1-snapshot-2
required: [url]