description: This cross-version extension represents Evidence.exposureBackground from http://hl7.org/fhir/StructureDefinition/Evidence|4.0.1 for use in FHIR R5.
package_name: rs/hl7.fhir.uv.xver
derivation: constraint
name: ext_R4_Evidence_exposureBackground
type: Extension
elements:
  value:
    base: {path: 'Extension.value[x]'}
    short: What population?
    choices: [valueReference]
    index: 1
  valueReference:
    base: {path: 'Extension.value[x]'}
    type: Reference
    short: What population?
    choiceOf: value
    refers: ['http://hl7.org/fhir/StructureDefinition/EvidenceVariable']
    index: 2
  url:
    pattern: {type: uri, value: 'http://hl7.org/fhir/4.0/StructureDefinition/extension-Evidence.exposureBackground'}
    type: uri
    index: 3
package_version: r4.r5-0.0.1-snapshot-1
class: extension
kind: complex-type
url: http://hl7.org/fhir/4.0/StructureDefinition/extension-Evidence.exposureBackground
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1-snapshot-1
required: [url]