description: The formal URI for the code system.  I.e. ValueSet.codeSystem.system (or its equivalent).
package_name: hl7.fhir.r2.examples
name: Where to find code system
type: null
elements:
  extension: {name: extension, index: 0}
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/valueset-systemRef'}
    index: 1
  value:
    choices: [valueUri]
    index: 3
  valueUri: {type: uri, choiceOf: value, index: 4}
package_version: 1.0.2
extensions: {}
class: datatype
kind: datatype
url: http://hl7.org/fhir/StructureDefinition/valueset-systemRef
version: null
required: [valueUri, value]