description: A FHIRPath or CQL expression, or FHIR Query that resolves to a list of candidate answers for the question item or that establishes context for a group item.  The user may select from among the candidates to choose answers for the question.
package_name: hl7.fhir.uv.sdc.r4b
derivation: constraint
name: CandidateExpressionExtension
type: Extension
elements:
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression'}
    index: 0
  value:
    choices: [valueExpression]
    index: 2
  valueExpression: {type: Expression, choiceOf: value, index: 3}
package_version: 3.0.0
class: extension
kind: complex-type
url: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 3.0.0