Choice

Question with a Coding drawn from a list of possible answers (specified in either the answerOption property, or via the valueset referenced in the answerValueSet property) as an answer (valueCoding).

Basic usage

Answer Option

Questionnaire-only

With Response

note

The current answerOption drop-down component doesn't allow the field to be cleared. There are plans to migrate to the same component used for answerValueSet.

Answer Value Set

Questionnaire-only

With Response

Advanced usage

Answer Option - Calculations (Radio button)

Answer Value Set - Calculations

There are SDC advanced form rendering usages in the SDC Question Rendering section.

If there are any advanced usage scenarios you'd like to see, feel free to let us know.

note

The above calculation examples uses valueCoding.code¹ as the FHIRPath expression result.

SDC Supported extensions

Code	Usage
variable	http://hl7.org/fhir/StructureDefinition/variable
answerExpression	http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression - Only tested with answerValueSet.
initialExpression	http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-initialExpression - InitialExpression should evaluate to a coding value.
calculatedExpression	http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression - CalculatedExpression should evaluate to a coding or valueCoding.code1 value.
enableWhenExpression	http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-enableWhenExpression
hidden	http://hl7.org/fhir/StructureDefinition/questionnaire-hidden
itemControl	http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl Supports: - autocomplete - drop-down - check-box - radio-button
choiceOrientation	http://hl7.org/fhir/StructureDefinition/questionnaire-choiceOrientation - ChoiceOrientation is only supported on itemControl "radio-button" and "check-box" extensions
required	item.required
repeats	item.repeats
readOnly	item.readOnly
answerOption	item.answerOption
answerValueSet	item.answerValueSet
initial	item.initial
enableWhen	item.enableWhen
enableBehavior	item.enableBehavior
text	item.text

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Footnotes

1. For calculated expressions, valueCoding.code as a fhirpath result is also permitted, as FHIRPath cannot dynamically generated a valueCoding object. ↩ ↩²