FHIR Tooling Extensions IG
1.1.0 - Release 0.2.0 International flag

FHIR Tooling Extensions IG, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 1.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/fhir-tools-ig/ and changes regularly. See the Directory of published versions

Extension: Json Empty Behavior Extension

Official URL: http://hl7.org/fhir/tools/StructureDefinition/json-empty-behavior Version: 1.1.0
Standards status: Informative Active as of 2026-03-04 Maturity Level: 4 Computable Name: JsonEmptyBehavior
Other Identifiers: OID:2.16.840.1.113883.4.642.40.1.42.26

empty-behaviour: what should be in JSON when a repeating elements has no items? Can be absent, present, or either

Context of Use

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Defines what should happen if a repeating element has no items
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/json-empty-behavior"
... value[x] 1..1 code Value of extension
Binding: Json Empty Behavior Codes Value Set (required)

doco Documentation for this format

Terminology Bindings (Differential)

Path Status Usage ValueSet Version Source
Extension.value[x] Base required Json Empty Behavior Codes Value Set 📦1.1.0 This IG
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Defines what should happen if a repeating element has no items
... id 0..1 id Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/json-empty-behavior"

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Extension.value[x] Base required Json Empty Behavior Codes Value Set 📦1.1.0 This IG

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Simple Extension with the type code: empty-behaviour: what should be in JSON when a repeating elements has no items? Can be absent, present, or either

Maturity: 4

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Defines what should happen if a repeating element has no items
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/json-empty-behavior"
... value[x] 1..1 code Value of extension
Binding: Json Empty Behavior Codes Value Set (required)

doco Documentation for this format

Terminology Bindings (Differential)

Path Status Usage ValueSet Version Source
Extension.value[x] Base required Json Empty Behavior Codes Value Set 📦1.1.0 This IG

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Defines what should happen if a repeating element has no items
... id 0..1 id Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/json-empty-behavior"

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Extension.value[x] Base required Json Empty Behavior Codes Value Set 📦1.1.0 This IG

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Simple Extension with the type code: empty-behaviour: what should be in JSON when a repeating elements has no items? Can be absent, present, or either

Maturity: 4

 

Other representations of profile: CSV, Excel, Schematron