| variable | http://hl7.org/fhir/StructureDefinition/variable |
| initialExpression | http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-initialExpression
- InitialExpression should evaluate to a integer or decimal value. |
| calculatedExpression | http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression
- CalculatedExpression should evaluate to integer or decimal value. |
| enableWhenExpression | http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-enableWhenExpression |
| hidden | http://hl7.org/fhir/StructureDefinition/questionnaire-hidden |
| entryFormat | http://hl7.org/fhir/StructureDefinition/entryFormat |
| required | item.required |
| repeats | item.repeats |
| readOnly | item.readOnly |
| maxLength | item.maxLength |
| minLength | http://hl7.org/fhir/StructureDefinition/minLength |
| regex | http://hl7.org/fhir/StructureDefinition/regex |
| minValue | http://hl7.org/fhir/StructureDefinition/minValue |
| maxValue | http://hl7.org/fhir/StructureDefinition/maxValue |
| maxDecimalPlaces | http://hl7.org/fhir/StructureDefinition/maxDecimalPlaces |
| initial | item.initial |
| enableWhen | item.enableWhen |
| enableBehavior | item.enableBehavior |
| text | item.text |