ExampleIG, published by Example Publisher. 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/trifork/fhir-ig-sample/ and changes regularly. See the Directory of published versions
Extension: Prefix
| Official URL: http://example.org/StructureDefinition/Prefix | Version: 0.1.0 | |||
| Active as of 2025-09-12 | Computable Name: PrefixExtension | |||
Extension for Prefix in UID's
Context of Use
-
Element ID:
Identifier
This extension may be used on the following element(s)
Usage info
Usages:
- Use this Extension: UID Identifier
- Examples for this Extension: Practitioner/MyPractitionerInstance
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 |
C | 0..* | Extension | Prefix Constraints: PrefixInvariant |
  extension |
0..0 | |||
| url |
1..1 | uri | "http://example.org/StructureDefinition/Prefix" | |
  Slices for value[x] |
1..1 | string | Value of extension Slice: Unordered, Open by type:$this | |
   value[x]:valueString |
1..1 | string | Value of extension | |
| Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
C | 0..* | Extension | Prefix Constraints: PrefixInvariant |
 id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..0 | |||
| url |
1..1 | uri | "http://example.org/StructureDefinition/Prefix" | |
| Slices for value[x] |
1..1 | string | Value of extension Slice: Unordered, Closed by type:$this | |
| value[x]:valueString |
1..1 | string | Value of extension | |
| 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 |
C | 0..* | Extension | Prefix Constraints: PrefixInvariant |
| extension |
0..0 | |||
| url |
1..1 | uri | "http://example.org/StructureDefinition/Prefix" | |
| Slices for value[x] |
1..1 | string | Value of extension Slice: Unordered, Open by type:$this | |
| value[x]:valueString |
1..1 | string | Value of extension | |
| Documentation for this format | ||||
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
C | 0..* | Extension | Prefix Constraints: PrefixInvariant |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..0 | |||
| url |
1..1 | uri | "http://example.org/StructureDefinition/Prefix" | |
| Slices for value[x] |
1..1 | string | Value of extension Slice: Unordered, Closed by type:$this | |
| value[x]:valueString |
1..1 | string | 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) | Details | Requirements |
| PrefixInvariant | error | Extension | Validation logic for the prefix extension. : value.matches('^[A-z0-9]+$') | |
| 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() |