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

For questions with a set of options, indicates the number of columns across which those choices should be organized. E.g., 2 columns, 5 columns, etc.
element_idtypes
Extension
Extension.extension
Extension.url
Extension.value[x]
Extension
Extension.id
Extension.extension
Extension.url
Extension.value[x]