FHIR Tooling Extensions IG
0.3.0 - 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 0.3.0 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 Nullable Extension (Experimental)

Official URL: http://hl7.org/fhir/tools/StructureDefinition/json-nullable Version: 0.3.0
Active as of 2024-11-20 Maturity Level: 2 Computable Name: JsonNullableExt
Other Identifiers: OID:2.16.840.1.113883.4.642.40.1.42.28

If an element is labelled nullable, it can be present as a null value in the json. If this extension does not appear, a null value is treated as an error

Context of Use

This extension may be used on the following element(s):

  • Element ID ElementDefinition
  • Element ID ElementDefinition.type

Usage info

Usage:

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

This structure is derived from Extension

Summary

Simple Extension of type boolean: If an element is labelled nullable, it can be present as a null value in the json. If this extension does not appear, a null value is treated as an error

Maturity: 2

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1 Extension Specifies if an element can have a null value in the json (instead of just being missing)
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/json-nullable"
... value[x] 1..1 boolean Value of extension

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1 Extension Specifies if an element can have a null value in the json (instead of just being missing)
... id 0..1 id Unique id for inter-element referencing
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/json-nullable"

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension of type boolean: If an element is labelled nullable, it can be present as a null value in the json. If this extension does not appear, a null value is treated as an error

Maturity: 2

Differential View

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1 Extension Specifies if an element can have a null value in the json (instead of just being missing)
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/json-nullable"
... value[x] 1..1 boolean Value of extension

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1 Extension Specifies if an element can have a null value in the json (instead of just being missing)
... id 0..1 id Unique id for inter-element referencing
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/tools/StructureDefinition/json-nullable"

doco Documentation for this format

 

Other representations of profile: CSV, Excel, Schematron

Constraints

IdGradePath(s)DetailsRequirements
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()