ACT-NOW Implementation Guide
0.5.0 - ci-build

ACT-NOW Implementation Guide, published by Te aho o te kahu - Cancer Control Agency. This guide is not an authorized publication; it is the continuous build for version 0.5.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/tewhatuora/actnow/ and changes regularly. See the Directory of published versions

## Extension: CourseNumber

Official URL: http://canshare.co.nz/fhir/StructureDefinition/an-course-number | Version: 0.5.0
Draft as of 2026-06-15 | Computable Name: CourseNumber

The course number (sequential number) for this regimen

Context of Use

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

- Element ID: `CarePlan`

Usage info

Usages:

- Use this Extension: Regimen Careplan
- Examples for this Extension: CarePlan/careplan-regimen-1

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 | Extension
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "http://canshare.co.nz/fhir/StructureDefinition/an-course-number"
value[x] |  | 0..1 | integer | Value of extension
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | 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 | "http://canshare.co.nz/fhir/StructureDefinition/an-course-number"
value[x] |  | 0..1 | integer | Value of extension
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type integer: The course number (sequential number) for this regimen

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Extension
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "http://canshare.co.nz/fhir/StructureDefinition/an-course-number"
value[x] |  | 0..1 | integer | Value of extension
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | 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 | "http://canshare.co.nz/fhir/StructureDefinition/an-course-number"
value[x] |  | 0..1 | integer | Value of extension
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type integer: The course number (sequential number) for this regimen

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()`