ERA FHIR specification - Local Development build (v1.0.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions
Extension: Extension dosageUnit
| Official URL: https://eradocumentation.atostek.com/StructureDefinition/extension/dosageUnit | Version: 1.0.0 | |||
| Draft as of 2026-04-30 | Computable Name: DosageUnit | |||
Extension for expressing dosage unit using code system 1.2.246.537.6.138.202001 "Sähköinen lääkemääräys - Annosyksikkö".
Context of Use
-
Element ID:
MedicationKnowledge
This extension may be used on the following element(s)
Usage info
Usages:
- Use this Extension: EraDrugDatabaseFiMedicationKnowledge
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.
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter:  |
|---|---|---|---|---|
  Extension |
0..* | Extension | Dosage unit | |
 url |
1..1 | uri | "https://eradocumentation.atostek.com/StructureDefinition/extension/dosageUnit" | |
 valueCoding |
1..1 | Coding | Value of extension | |
 id |
0..0 | Unique id for inter-element referencing | ||
 extension |
0..0 | Extension | ||
| system |
1..1 | uri | Identity of the terminology system Fixed Value: 1.2.246.537.6.138.202001 (no extensions allowed) | |
| version |
0..0 | Version of the system - if relevant | ||
| code |
1..1 | code | Symbol in syntax defined by the system | |
| display |
0..1 | string | Representation defined by the system | |
 userSelected |
0..0 | If this coding was chosen directly by the user | ||
| Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Dosage unit | |
 id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| url |
1..1 | uri | "https://eradocumentation.atostek.com/StructureDefinition/extension/dosageUnit" | |
 Slices for value[x] |
1..1 | Coding | Value of extension Slice: Unordered, Closed by type:$this | |
  value[x]:valueCoding |
1..1 | Coding | Value of extension | |
 extension |
0..0 | Extension Slice: Unordered, Open by value:url | ||
| system |
1..1 | uri | Identity of the terminology system Fixed Value: 1.2.246.537.6.138.202001 (no extensions allowed) | |
| code |
1..1 | code | Symbol in syntax defined by the system | |
 display |
0..1 | string | Representation defined by the system | |
| Documentation for this format | ||||
This structure is derived from Extension
Differential View
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Dosage unit | |
| url |
1..1 | uri | "https://eradocumentation.atostek.com/StructureDefinition/extension/dosageUnit" | |
| valueCoding |
1..1 | Coding | Value of extension | |
| id |
0..0 | Unique id for inter-element referencing | ||
| extension |
0..0 | Extension | ||
| system |
1..1 | uri | Identity of the terminology system Fixed Value: 1.2.246.537.6.138.202001 (no extensions allowed) | |
| version |
0..0 | Version of the system - if relevant | ||
| code |
1..1 | code | Symbol in syntax defined by the system | |
| display |
0..1 | string | Representation defined by the system | |
| userSelected |
0..0 | If this coding was chosen directly by the user | ||
| Documentation for this format | ||||
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Dosage unit | |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| url |
1..1 | uri | "https://eradocumentation.atostek.com/StructureDefinition/extension/dosageUnit" | |
| Slices for value[x] |
1..1 | Coding | Value of extension Slice: Unordered, Closed by type:$this | |
| value[x]:valueCoding |
1..1 | Coding | Value of extension | |
| extension |
0..0 | Extension Slice: Unordered, Open by value:url | ||
| system |
1..1 | uri | Identity of the terminology system Fixed Value: 1.2.246.537.6.138.202001 (no extensions allowed) | |
| code |
1..1 | code | Symbol in syntax defined by the system | |
| display |
0..1 | string | Representation defined by the system | |
| 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()
|