description: This text is intended to act as a citation to work done elsewhere that is not part of the current stewarding process where the referenced source is in some way a basis of the current value set definition.
package_name: hl7.fhir.r4b.core
derivation: constraint
name: sourceReference
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-sourceReference'}
    index: 1
  value:
    choices: [valueUri]
    index: 3
  valueUri: {type: uri, choiceOf: value, index: 4}
package_version: 4.1.0
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/codesystem-sourceReference
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 4.1.0
required: [valueUri, value]