---
type: "sdc-page"
title: "SDC: StructureDefinition-sdc-questionnaire-choiceColumn-intro"
source: "sdc/input/pagecontent/StructureDefinition-sdc-questionnaire-choiceColumn-intro.xml"
---
# SDC: StructureDefinition-sdc-questionnaire-choiceColumn-intro

Additional details on the use of this extension can be found on the [Advanced Rendering](/sdc-rendering#choiceColumn) and [Questionnaire Population](/sdc-populate#expression-based-population) pages.