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: Immunization Diluent

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

Immunization Diluent

Context of Use

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

- Element ID: `Immunization`

Usage info

Usages:

- Use this Extension: AIR Immunization
- Examples for this Extension: Bundle/72178030, Bundle/82020190, Bundle/AIRBundleCarePlanExample, Bundle/AIRBundleOrchestrationExample and Immunization/imm-example-2

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 | Immunization Diluent
Slices for extension |  |  |  | Content/Rules for all slices
extension:diluentLotNumber |  | 0..1 | Extension | Extension
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "diluentLotNumber"
value[x] |  | 0..1 | string | Value of extension
extension:diluentExpiryDate |  | 0..1 | Extension | Extension
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "diluentExpiryDate"
value[x] |  | 0..1 | date | Value of extension
url |  | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-diluent"
value[x] |  | 0..0 |  | Value of extension
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Immunization Diluent
id |  | 0..1 | string | Unique id for inter-element referencing
Slices for extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
extension:diluentLotNumber |  | 0..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 | "diluentLotNumber"
value[x] |  | 0..1 | string | Value of extension
extension:diluentExpiryDate |  | 0..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 | "diluentExpiryDate"
value[x] |  | 0..1 | date | Value of extension
url |  | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-diluent"
Documentation for this format

This structure is derived from Extension

Summary

Complex Extension: Immunization Diluent

- diluentLotNumber: string: An Extension
- diluentExpiryDate: date: An Extension

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Immunization Diluent
Slices for extension |  |  |  | Content/Rules for all slices
extension:diluentLotNumber |  | 0..1 | Extension | Extension
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "diluentLotNumber"
value[x] |  | 0..1 | string | Value of extension
extension:diluentExpiryDate |  | 0..1 | Extension | Extension
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "diluentExpiryDate"
value[x] |  | 0..1 | date | Value of extension
url |  | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-diluent"
value[x] |  | 0..0 |  | Value of extension
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Immunization Diluent
id |  | 0..1 | string | Unique id for inter-element referencing
Slices for extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
extension:diluentLotNumber |  | 0..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 | "diluentLotNumber"
value[x] |  | 0..1 | string | Value of extension
extension:diluentExpiryDate |  | 0..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 | "diluentExpiryDate"
value[x] |  | 0..1 | date | Value of extension
url |  | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-diluent"
Documentation for this format

This structure is derived from Extension

Summary

Complex Extension: Immunization Diluent

- diluentLotNumber: string: An Extension
- diluentExpiryDate: date: An Extension

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()`