description: This cross-version extension represents EvidenceVariable.characteristic.definition[x] from http://hl7.org/fhir/StructureDefinition/EvidenceVariable|4.3.0 for use in FHIR R4.
package_name: rs/hl7.fhir.uv.xver
derivation: constraint
name: ext_R4B_EvidenceVariable_ch_definition
type: Extension
elements:
  value:
    base: {path: 'Extension.value[x]'}
    short: What code or expression defines members?
    choices: [valueReference, valueCanonical, valueCodeableConcept, valueExpression]
    index: 1
  valueReference:
    short: What code or expression defines members?
    refers: ['http://hl7.org/fhir/StructureDefinition/EvidenceVariable', 'http://hl7.org/fhir/StructureDefinition/Group']
    type: Reference
    base: {path: 'Extension.value[x]'}
    choiceOf: value
    index: 2
  valueCanonical:
    base: {path: 'Extension.value[x]'}
    type: canonical
    short: What code or expression defines members?
    choiceOf: value
    index: 3
  valueCodeableConcept:
    base: {path: 'Extension.value[x]'}
    type: CodeableConcept
    short: What code or expression defines members?
    choiceOf: value
    index: 4
  valueExpression:
    base: {path: 'Extension.value[x]'}
    type: Expression
    short: What code or expression defines members?
    choiceOf: value
    index: 5
  url:
    pattern: {type: uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-EvidenceVariable.characteristic.definition'}
    type: uri
    index: 6
package_version: r4b.r4-0.0.1-snapshot-1
class: extension
kind: complex-type
url: http://hl7.org/fhir/4.3/StructureDefinition/extension-EvidenceVariable.characteristic.definition
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1-snapshot-1
required: [url]