description: An expression (FHIRPath, CQL or FHIR Query) that resolves to a list of permitted answers for the question item or that establishes context for a group item.  The user may select from among the list to choose answers for the question.
package_name: hl7.fhir.uv.sdc
derivation: constraint
name: AnswerExpressionExtension
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression'}
    index: 1
  value:
    choices: [valueExpression]
    index: 3
  valueExpression: {type: Expression, choiceOf: value, index: 4}
package_version: 4.0.0-ballot
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 4.0.0-ballot