eHealth Platform Federal infsec Profiles
1.3.0 - STU1 Belgium flag

This page is part of the HL7 Belgium FHIR Implementation Guide - Infrastructure and Security Profiles profiles (v1.3.0: Release) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version. For a full list of available versions, see the Directory of published versions

Extension: Key Pseudonymization Extension

Official URL: https://www.ehealth.fgov.be/standards/fhir/infsec/StructureDefinition/be-ext-key-pseudonymization Version: 1.3.0
Active as of 2026-06-26 Computable Name: BeExtKeyPseudonymization

This holds a pseudonymized key that can be used for all encrypted fields in the resource (long text pseudonymisation)

Context of Use

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

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 Pseudonymization key (See Blinded Pseudonymization Cookbook, Annex: Processing of input data exceeding 32 bytes)
... id S 1..1 string kid (also available in JWE)
... extension 1..* Extension Extension
... Slices for extension Content/Rules for all slices
.... extension:key S 1..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "key"
..... value[x] S 1..1 string pseudonymized key
...... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
...... Slices for extension Content/Rules for all slices
....... extension:pseudonymization 1..1 (Complex) Pseudonymization data
URL: https://www.ehealth.fgov.be/standards/fhir/infsec/StructureDefinition/be-ext-pseudonymization
... value[x] 0..0 Value of extension

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Pseudonymization key (See Blinded Pseudonymization Cookbook, Annex: Processing of input data exceeding 32 bytes)
... id S 1..1 string kid (also available in JWE)
... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
.... extension:key S 1..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "key"
..... value[x] S 1..1 string pseudonymized key
...... id 0..1 string xml:id (or equivalent in JSON)
...... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
...... Slices for extension Content/Rules for all slices
....... extension:pseudonymization 1..1 (Complex) Pseudonymization data
URL: https://www.ehealth.fgov.be/standards/fhir/infsec/StructureDefinition/be-ext-pseudonymization
...... value 0..1 string Primitive value for string
Max Length:1048576
... url 1..1 uri "https://www.ehealth.fgov.be/standards/fhir/infsec/StructureDefinition/be-ext-key-pseudonymization"

doco Documentation for this format

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

Complex Extension: This holds a pseudonymized key that can be used for all encrypted fields in the resource (long text pseudonymisation)

  • key: string: An Extension

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Pseudonymization key (See Blinded Pseudonymization Cookbook, Annex: Processing of input data exceeding 32 bytes)
... id S 1..1 string kid (also available in JWE)
... extension 1..* Extension Extension
... Slices for extension Content/Rules for all slices
.... extension:key S 1..1 Extension Extension
..... extension 0..0 Extension
..... url 1..1 uri "key"
..... value[x] S 1..1 string pseudonymized key
...... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
...... Slices for extension Content/Rules for all slices
....... extension:pseudonymization 1..1 (Complex) Pseudonymization data
URL: https://www.ehealth.fgov.be/standards/fhir/infsec/StructureDefinition/be-ext-pseudonymization
... value[x] 0..0 Value of extension

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Pseudonymization key (See Blinded Pseudonymization Cookbook, Annex: Processing of input data exceeding 32 bytes)
... id S 1..1 string kid (also available in JWE)
... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
.... extension:key S 1..1 Extension Extension
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "key"
..... value[x] S 1..1 string pseudonymized key
...... id 0..1 string xml:id (or equivalent in JSON)
...... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
...... Slices for extension Content/Rules for all slices
....... extension:pseudonymization 1..1 (Complex) Pseudonymization data
URL: https://www.ehealth.fgov.be/standards/fhir/infsec/StructureDefinition/be-ext-pseudonymization
...... value 0..1 string Primitive value for string
Max Length:1048576
... url 1..1 uri "https://www.ehealth.fgov.be/standards/fhir/infsec/StructureDefinition/be-ext-key-pseudonymization"

doco Documentation for this format

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

Complex Extension: This holds a pseudonymized key that can be used for all encrypted fields in the resource (long text pseudonymisation)

  • key: string: An Extension

 

Other representations of profile: CSV, Excel, Schematron