HL7® FHIR® Te Aho o Te Kahu, Cancer Control Agency 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 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7NZ/cca/ and changes regularly. See the Directory of published versions
Extension: Off label
| Official URL: http://hl7.org.nz/fhir/StructureDefinition/sact-off-label | Version: 0.1.0 | |||
| Active as of 2026-05-21 | Computable Name: OffLabel | |||
Indicates that the medication is being used for a purpose for which it has not been specifically approved
Context of Use
-
Element ID:
ActivityDefinition
This extension may be used on the following element(s)
Usage info
Usages:
- Use this Extension: ActivityDefinition and PlanDefinition
- Examples for this Extension: ActivityDefinition/ActCabergoline, LUNG NSCLC Metastatic - alectinib, LUNG NSCLC NON-Metastatic - alectinib, GU PROS Castration resistant Metastatic - abiraterone and dexamethasone and GYN END Adjuvant - cISplatin chemoradiation followed by cARBOplatin and PACLItaxel
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.
| Name | Flags | Card. | Type | Description & Constraints Filter:   |
|---|---|---|---|---|
  Extension |
0..* | Extension | Off label | |
  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://hl7.org.nz/fhir/StructureDefinition/sact-off-label" | |
 value[x] |
0..1 | boolean | Value of extension | |
| Documentation for this format | ||||
This structure is derived from Extension
Differential View
This structure is derived from Extension
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Off label | |
| 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://hl7.org.nz/fhir/StructureDefinition/sact-off-label" | |
| value[x] |
0..1 | boolean | Value of extension | |
| Documentation for this format | ||||
This structure is derived from 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()
|