description: Identifies a filter to apply when looking up candidate answers for the question.
package_name: hl7.fhir.core
derivation: constraint
name: Filter to apply when looking up references
type: null
elements:
  extension: {name: extension, index: 0}
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter'}
    index: 1
  value:
    choices: [valueString]
    index: 3
  valueString: {type: string, choiceOf: value, index: 4}
package_version: 1.4.0
extensions: {}
class: datatype
kind: datatype
url: http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null
required: [valueString, value]