http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemExtractionContext|4.0.0-ballot

Specifies a query or other expression that identifies the resource (or set of resources for a repeating item) to be extracted from this item once the QuestionnaireResponse is complete. This extension is deprecated in favor of the `DefinitionExtractExtension` extension.