description: This cross-version extension represents Observation.performer from http://hl7.org/fhir/StructureDefinition/Observation|1.0.2 for use in FHIR R4B.
package_name: hl7.fhir.uv.xver-r2.r4b
derivation: constraint
name: ext_R2_Observation_performer
type: Extension
elements:
  value:
    base: {path: 'Extension.value[x]'}
    short: Who is responsible for the observation
    choices: [valueReference]
    index: 1
  valueReference:
    short: Who is responsible for the observation
    refers: ['http://hl7.org/fhir/StructureDefinition/Organization', 'http://hl7.org/fhir/StructureDefinition/Patient', 'http://hl7.org/fhir/StructureDefinition/Practitioner', 'http://hl7.org/fhir/StructureDefinition/RelatedPerson']
    type: Reference
    base: {path: 'Extension.value[x]'}
    choiceOf: value
    index: 2
  url:
    pattern: {type: uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-Observation.performer'}
    type: uri
    index: 3
package_version: 0.0.1-snapshot-1
class: extension
kind: complex-type
url: http://hl7.org/fhir/1.0/StructureDefinition/extension-Observation.performer
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1-snapshot-1
required: [url]