ITB - Online appointment booking service
1.0.0 - Initial Release
ITB - Online appointment booking service
1.0.0 - Initial Release
This page is part of the Wof Portal Public API (v1.0.0: Release) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions
| Official URL: https://canonical.fhir.link/servicewell/wof-portal/StructureDefinition/activity-definition-reference | Version: 1.0.0 | |||
| Active as of 2026-04-21 | Computable Name: ActivityDefinitionReference | |||
A reference to an ActivityDefinition that describes the type of activity or service associated with an Appointment.
This extension allows linking an Appointment to a formal definition of the activity being performed, enabling structured representation of the intended service or procedure.
Context of Use
This extension may be used on the following element(s)
Appointment
Usage info
Usages:
You can also check for usages in the FHIR IG Statistics
Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter:   |
|---|---|---|---|---|
  Extension |
0..* | Extension | ActivityDefinitionReference | |
  extension |
0..0 | Extension | ||
| url |
1..1 | uri | "https://canonical.fhir.link/servicewell/wof-portal/StructureDefinition/activity-definition-reference" | |
  value[x] |
1..1 | Reference(ActivityDefinitionPortal) | Reference to an ActivityDefinition | |
| Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | ActivityDefinitionReference | |
 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://canonical.fhir.link/servicewell/wof-portal/StructureDefinition/activity-definition-reference" | |
| value[x] |
1..1 | Reference(ActivityDefinitionPortal) | Reference to an ActivityDefinition | |
| Documentation for this format | ||||
This structure is derived from Extension
Summary
Simple Extension with the type Reference: A reference to an ActivityDefinition that describes the type of activity or service associated with an Appointment.
This extension allows linking an Appointment to a formal definition of the activity being performed, enabling structured representation of the intended service or procedure.
Differential View
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | ActivityDefinitionReference | |
| extension |
0..0 | Extension | ||
| url |
1..1 | uri | "https://canonical.fhir.link/servicewell/wof-portal/StructureDefinition/activity-definition-reference" | |
| value[x] |
1..1 | Reference(ActivityDefinitionPortal) | Reference to an ActivityDefinition | |
| Documentation for this format | ||||
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | ActivityDefinitionReference | |
| 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://canonical.fhir.link/servicewell/wof-portal/StructureDefinition/activity-definition-reference" | |
| value[x] |
1..1 | Reference(ActivityDefinitionPortal) | Reference to an ActivityDefinition | |
| Documentation for this format | ||||
This structure is derived from Extension
Summary
Simple Extension with the type Reference: A reference to an ActivityDefinition that describes the type of activity or service associated with an Appointment.
This extension allows linking an Appointment to a formal definition of the activity being performed, enabling structured representation of the intended service or procedure.
Other representations of profile: CSV, Excel, Schematron
| 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()
|