Structured Data Capture
4.0.0 - STU 4 International flag

This page is part of the Structured Data Capture FHIR IG (v4.0.0: STU 4) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version. For a full list of available versions, see the Directory of published versions

CodeSystem: Questionnaire answer constraint codes

Official URL: http://hl7.org/fhir/uv/sdc/CodeSystem/questionnaire-answer-constraint Version: 4.0.0
Standards status: Trial-use Active as of 2026-03-24 Maturity Level: 4 Computable Name: QuestionnaireAnswerConstraintCodes
Other Identifiers: OID:2.16.840.1.113883.4.642.1.0

Codes that describe the types of constraints possible on a question item that has a list of permitted answers [Note: This is a clone of QuestionnaireAnswerConstraint codesystem from R5 (adopting R5 capability)]

This Code system is referenced in the definition of the following value sets:

This case-sensitive code system http://hl7.org/fhir/uv/sdc/CodeSystem/questionnaire-answer-constraint defines the following codes:

CodeDisplayDefinition
optionsOnly Options only Only values listed as answerOption or in the expansion of the answerValueSet are permitted
optionsOrType Options or 'type' In addition to the values listed as answerOption or in the expansion of the answerValueSet, any other values that correspond to the specified item.type are permitted
optionsOrString Options or string In addition to the values listed as answerOption or in the expansion of the answerValueSet, free-text strings are permitted. Answers will have a type of 'string'.

Description of the above table(s).