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

Additional details on the use of this extension can be found on the [Modular Forms](/sdc-modular#modular-questionnaires) page.