<status value="active"/> <experimental value="true"/> <publisher value="HL7 International"/> <description value="Codes that describe the types of constraints possible on a question item that has a list of permitted answers"/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> <display value="World"/> </coding> </jurisdiction> <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>

This code system http://hl7.org/fhir/questionnaire-answer-constraint defines the following codes:

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'.