description: This cross-version extension represents Observation.comments from http://hl7.org/fhir/StructureDefinition/Observation|1.0.2 for use in FHIR R4B.
package_name: rs/hl7.fhir.uv.xver
derivation: constraint
name: ext_R2_Observation_comments
type: Extension
elements:
  value:
    base: {path: 'Extension.value[x]'}
    short: Comments about result
    choices: [valueString]
    index: 1
  valueString:
    base: {path: 'Extension.value[x]'}
    type: string
    short: Comments about result
    choiceOf: value
    index: 2
  url:
    pattern: {type: uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-Observation.comments'}
    type: uri
    index: 3
package_version: r2.r4b-0.0.1-snapshot-1
class: extension
kind: complex-type
url: http://hl7.org/fhir/1.0/StructureDefinition/extension-Observation.comments
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1-snapshot-1
required: [url]