description: Reference to a specific Questionnaire Resource as an ordered item. Allows for ordering a specific questionnaire to be completed. package_name: hl7.fhir.core derivation: constraint name: questionnaireRequest type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/servicerequest-questionnaireRequest'} index: 1 valueReference: type: Reference refers: ['http://hl7.org/fhir/StructureDefinition/Questionnaire'] index: 2 package_version: 3.5.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/servicerequest-questionnaireRequest base: http://hl7.org/fhir/StructureDefinition/Extension version: null