Aotearoa Immunisation Register (AIR) FHIR Implementation Guide
2.1.0 - release New Zealand

Aotearoa Immunisation Register (AIR) FHIR Implementation Guide - Local Development build (v2.1.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

## Extension: AIR Series Type Extension

Official URL: https://standards.digital.health.nz/fhir/air/StructureDefinition/air-timingAge-ISO8601-extension | Version: 2.1.0
Active as of 2026-07-21 | Computable Name: air-timingAge-ISO8601-extension

Describes the series type used in AGVS.

Context of Use

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

- Element ID: `Element`

Usage info

Usages:

- Use this Extension: Immunization Dose Recommendation

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 Series Type Extension
extension |  | 0..0 |  | Extension
url | S | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-timingAge-ISO8601-extension"
Slices for value[x] |  | 1..1 | string | Value of extension Slice: Unordered, Open by type:$this
value[x]:valueString | S | 1..1 | string | Value of extension
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | AIR Series Type Extension
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url | S | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-timingAge-ISO8601-extension"
Slices for value[x] |  | 1..1 | string | Value of extension Slice: Unordered, Closed by type:$this
value[x]:valueString | S | 1..1 | string | Value of extension
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type string: Describes the series type used in AGVS.

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | AIR Series Type Extension
extension |  | 0..0 |  | Extension
url | S | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-timingAge-ISO8601-extension"
Slices for value[x] |  | 1..1 | string | Value of extension Slice: Unordered, Open by type:$this
value[x]:valueString | S | 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 Series Type Extension
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url | S | 1..1 | uri | "https://standards.digital.health.nz/fhir/air/StructureDefinition/air-timingAge-ISO8601-extension"
Slices for value[x] |  | 1..1 | string | Value of extension Slice: Unordered, Closed by type:$this
value[x]:valueString | S | 1..1 | string | Value of extension
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type string: Describes the series type used in AGVS.

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()`