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Using Codes Code Systems Value Sets Concept Maps Identifier Systems

4.3.14.16 4.3.2.164 Code System CodeSystem http://hl7.org/fhir/questionnaire-enable-operator

  Maturity Level : 3
Responsible Owner: FHIR Infrastructure icon Work Group Trial Use Normative Use Context : Any Country: World
This is a code system defined by the FHIR project. Summary
  • Defining URL: Narrative http://hl7.org/fhir/questionnaire-enable-operator
  • XML Version:
  • 4.0.1 JSON
  • Name: TTL QuestionnaireItemOperator
Committee:
Official URL : Title: http://hl7.org/fhir/questionnaire-enable-operator QuestionnaireItemOperator Definition: The criteria by which a question is enabled. Version : 6.0.0-ballot3
active as of 2021-01-04 FHIR Infrastructure Computable Name : QuestionnaireItemOperator Work Group
OID: 2.16.840.1.113883.4.642.4.1006 (for OID based terminology systems) Flags : CaseSensitive, Complete. All codes ValueSet: Questionnaire Item Operator Source Resource XML / JSON OID : 2.16.840.1.113883.4.642.4.1006

This Code system is used in the following FHIR core-defined or referenced value sets:

4.3.14.16.1 4.3.2.164.1 Content Definition

The criteria by which a question is enabled.

4.3.14.16.2 4.3.2.164.2 QuestionnaireItemOperator Content

The criteria by which a question is enabled.

Generated Narrative: CodeSystem questionnaire-enable-operator

Last updated: 2025-11-24T20:46:00.1Z

This case-sensitive code system http://hl7.org/fhir/questionnaire-enable-operator defines the following codes:

Code Display Definition Copy
exists Exists True if whether the determination of 'whether an answer exists for the question' is equal to the enableWhen answer (which must be a boolean). btn   btn
= Equals True if whether at least one answer has a value that is equal to the enableWhen answer. btn   btn
!= Not Equals True if whether at least no answer has a value that is equal to the enableWhen answer. btn   btn
> Greater Than True if whether at least no one answer has a value that is greater than the enableWhen answer. btn   btn
< Less Than True if whether at least no one answer has a value that is less than the enableWhen answer. btn   btn
>= Greater or Equals True if whether at least no one answer has a value that is greater or equal to the enableWhen answer. btn   btn
<= Less or Equals True if whether at least no one answer has a value that is less or equal to the enableWhen answer. btn   btn

 

See the full registry of code systems defined as part of FHIR.

Explanation of the columns that may appear on this page:

Level A few code lists that FHIR defines are hierarchical - each code is assigned a level. See Code System for further information.
Source The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code The code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
Display The display (used in the display element of a Coding ). If there is no display, implementers should not simply display the code, but map the concept into their application
Definition An explanation of the meaning of the concept
Comments Additional notes about how to use the code