FHIR Tooling Extensions IG
0.8.0 - 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 0.8.0 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

Official URL: http://hl7.org/fhir/tools/StructureDefinition/json-nullable Version: 0.8.0
Standards status: Informative Maturity Level: 4 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

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

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

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. 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 & Constraints    Filter: Filtersdoco
.. 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 with the 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: 4

Differential View

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. 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 & Constraints    Filter: Filtersdoco
.. 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 with the 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: 4

 

Other representations of profile: CSV, Excel, Schematron

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()