description: This cross-version extension represents SubstanceSpecification.code.comment from http://hl7.org/fhir/StructureDefinition/SubstanceSpecification|4.0.1 for use in FHIR R4B.
package_name: hl7.fhir.uv.xver
derivation: constraint
name: Ext_R4_SS_co_comment
type: Extension
elements:
  url:
    base: {max: '1', min: 1, path: Extension.url}
    pattern: {type: Uri, value: 'http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.code.comment'}
    index: 0
  value:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    short: Any comment can be provided in this field, if necessary
    choices: [valueString]
    index: 2
  valueString:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    type: string
    short: Any comment can be provided in this field, if necessary
    choiceOf: value
    index: 3
package_version: r4.r4b-0.0.1-snapshot-2
class: extension
kind: complex-type
url: http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.code.comment
base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0
version: 0.0.1-snapshot-2
required: [url]