FHIR Tooling Extensions IG
1.1.0 - Release 0.2.0
FHIR Tooling Extensions IG
1.1.0 - Release 0.2.0
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
| Official URL: http://hl7.org/fhir/tools/StructureDefinition/extension-style | Version: 1.1.0 | ||||
| Standards status: Informative Active as of 2026-03-04 | Maturity Level: 3 | Computable Name: ExtensionStylesEXT | |||
| Other Identifiers: OID:2.16.840.1.113883.4.642.40.1.42.14 | |||||
How the type can be extended. Note that all FHIR types that inherit from Element have extension-style = fhir-extensions
Context of Use
This extension may be used on the following element(s)
StructureDefinition
ElementDefinition
Usage info
Usages:
You can also check for usages in the FHIR IG Statistics
Description Differentials, Snapshots, and other representations.
| Name | Flags | Card. | Type | Description & Constraints Filter:   |
|---|---|---|---|---|
  Extension |
0..* | Extension | How the type can be extended | |
  extension |
0..0 | Extension | ||
| url |
1..1 | uri | "http://hl7.org/fhir/tools/StructureDefinition/extension-style" | |
  value[x] |
1..1 | code | Value of extension Binding: Extension Style ValueSet (required) | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | required | Extension Style ValueSet | 📦1.1.0 | This IG |
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
 Extension |
0..* | Extension | How the type can be extended | |
| 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/extension-style" | |
| value[x] |
1..1 | code | Value of extension Binding: Extension Style ValueSet (required) | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | required | Extension Style ValueSet | 📦1.1.0 | This IG |
| 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: How the type can be extended. Note that all FHIR types that inherit from Element have extension-style = fhir-extensions
Maturity: 3
Differential ViewDifferential View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | How the type can be extended | |
| extension |
0..0 | Extension | ||
| url |
1..1 | uri | "http://hl7.org/fhir/tools/StructureDefinition/extension-style" | |
| value[x] |
1..1 | code | Value of extension Binding: Extension Style ValueSet (required) | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | required | Extension Style ValueSet | 📦1.1.0 | This IG |
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | How the type can be extended | |
| 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/extension-style" | |
| value[x] |
1..1 | code | Value of extension Binding: Extension Style ValueSet (required) | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | required | Extension Style ValueSet | 📦1.1.0 | This IG |
| 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: How the type can be extended. Note that all FHIR types that inherit from Element have extension-style = fhir-extensions
Maturity: 3
Other representations of profile: CSV, Excel, Schematron
IG © 2022+ HL7 International / FHIR Infrastructure.
Package hl7.fhir.uv.tools#1.1.0 based on FHIR 5.0.0.
Generated
2026-03-04
Links: Table of Contents |
QA Report
| Version History |
|
Propose a change