---
type: "codesystem"
title: "Questionnaire answer constraint codes"
codesystem: "questionnaire-answer-constraint"
---
# Questionnaire answer constraint codes

- **Official URL**: http://hl7.org/fhir/questionnaire-answer-constraint
- **Version**: 6.0.0
- **Status**: active
- **Name**: QuestionnaireAnswerConstraint
- **Title**: Questionnaire answer constraint codes
- **Description**: Codes that describe the types of constraints possible on a question item that has a list of permitted answers
- **Case Sensitive**: true
- **Content**: complete

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| 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'. |

## CodeSystem XML



```xml
<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="questionnaire-answer-constraint"/>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="fhir"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="normative"/>
  </extension>
  <url value="http://hl7.org/fhir/questionnaire-answer-constraint"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.2019"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="QuestionnaireAnswerConstraint"/>
  <title value="Questionnaire answer constraint codes"/>
  <status value="active"/>
  <experimental value="false"/>
  <description value="Codes that describe the types of constraints possible on a question item that has a list of permitted answers"/>
  <caseSensitive value="true"/>
  <content value="complete"/>
  <concept>
    <code value="optionsOnly"/>
    <display value="Options only"/>
    <definition value="Only values listed as answerOption or in the expansion of the answerValueSet are permitted"/>
  </concept>
  <concept>
    <code value="optionsOrType"/>
    <display value="Options or 'type'"/>
    <definition value="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"/>
  </concept>
  <concept>
    <code value="optionsOrString"/>
    <display value="Options or string"/>
    <definition value="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'."/>
  </concept>
</CodeSystem>
```