description: A comment that explains how this code is used in this context (where the value set is expected to be used).  This extension not permitted from R5, because the comment CodeSystem property should be used instead.
package_name: hl7.fhir.uv.extensions.r4
derivation: constraint
name: CSConceptComments
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments'}
    type: uri
    index: 1
  value:
    choices: [valueString]
    index: 3
  valueString: {type: string, choiceOf: value, index: 4}
package_version: 5.3.0-ballot
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 5.3.0-ballot
required: [value, valueString]