description: 'R4: `SubstanceSpecification.source` (new:Reference(DocumentReference))'
package_name: hl7.fhir.uv.xver-r4.r3
derivation: constraint
name: ExtensionSubstanceSpecification_Source
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.source'}
    index: 0
  value:
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    short: Supporting literature
    choices: [valueReference, valueReference]
    index: 2
  valueReference:
    short: Supporting literature
    refers: ['http://hl7.org/fhir/4.0/StructureDefinition/profile-DocumentReference|0.1.0']
    type: Reference
    base: {max: '1', min: 0, path: 'Extension.value[x]'}
    choiceOf: value
    index: 3
package_version: 0.1.0
class: extension
kind: complex-type
url: http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.source
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.1.0
required: [url]