Aotearoa Immunisation Register (AIR) FHIR Implementation Guide (API-V1)
1.27.0 - release New Zealand

Aotearoa Immunisation Register (AIR) FHIR Implementation Guide (API-V1) - Local Development build (v1.27.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

## Extension: AIR Modified Source System

Official URL: https://standards.digital.health.nz/fhir/air/StructureDefinition/air-modified-source-system | Version: 1.27.0
Active as of 2026-08-05 | Computable Name: AIRModifiedSourceSystem

This extension is used in AIR to record the system or software used to update the immunisation event or patient record. Example values are ISM, PMS, and so on.

Context of Use

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

- Path (Immunization|Patient).meta

Usage info

Usages:

- Use this Extension: AIR Immunization and AIR Patient Profile
- Examples for this Extension: Bundle/AIRBundleCarePlanExample, Bundle/AIRBundleOrchestrationExample, Immunization/imm-example-2, Immunization/immunisation-update-response-message-match-quality and Immunization/immunisation-update-response-message-meta-tag

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.

- Differential Table
- Snapshot Table
- Statistics/References
- All

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | AIR Modified Source System
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-modified-source-system"
value[x] |  | 1..1 | string | Value of extension
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | AIR Modified Source System
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-modified-source-system"
value[x] |  | 1..1 | string | Value of extension
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type string: This extension is used in AIR to record the system or software used to update the immunisation event or patient record. Example values are ISM, PMS, and so on.

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | AIR Modified Source System
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-modified-source-system"
value[x] |  | 1..1 | string | Value of extension
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | AIR Modified Source System
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-modified-source-system"
value[x] |  | 1..1 | string | Value of extension
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type string: This extension is used in AIR to record the system or software used to update the immunisation event or patient record. Example values are ISM, PMS, and so on.

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()`