Dissolve-E: AWMF Guideline Registry - Local Development build (v0.2.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions
Extension: RelatesTo Classifier
| Official URL: http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-relates-to-classifier | Version: 0.2.0 | |||
| Draft as of 2026-01-29 | Computable Name: RelatesToClassifier | |||
This extension defines a classification for the 'relatesTo' relationship using a CodeableConcept.
Context of Use
-
Element ID:
Composition.relatesTo
This extension may be used on the following element(s)
Guidance
This extension defines a classification for the relatesTo relationship using a CodeableConcept.
Overview
When linking related artifacts (guidelines, documents, websites), the relatesTo.type provides the basic relationship type (e.g., similar-to, documentation). This extension provides an additional layer of classification to specify the nature of the related item more precisely.
Context
This extension can be applied to Composition.relatesTo elements.
Value Type
The value is a CodeableConcept:
* value[x] only CodeableConcept
* valueCodeableConcept 1..1
Example Usage
// Classify a related guideline:
* relatesTo[relatedGuideline]
* type = #similar-to
* extension[classifier].valueCodeableConcept = cs-related-artifact-types#related-guideline
// Classify a dissemination website:
* relatesTo[disseminationWebsite]
* type = #documentation
* extension[classifier].valueCodeableConcept from vs-dissemination-website (required)
This profile of a FHIR Extension is derived from the Extension FHIR resource.
Usage info
Usages:
- This Extension is not used by any profiles in this Implementation Guide
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 | RelatesTo Classifier | |
  extension |
0..0 | Extension | ||
| url |
1..1 | uri | "http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-relates-to-classifier" | |
  value[x] |
1..1 | CodeableConcept | Value of extension | |
| Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | RelatesTo Classifier | |
 id |
0..1 | id | Unique id for inter-element referencing | |
| extension |
0..0 | Extension Slice: Unordered, Open by value:url | ||
| url |
Σ | 1..1 | uri | "http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-relates-to-classifier" |
| value[x] |
Σ | 1..1 | CodeableConcept | 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 |
0..* | Extension | RelatesTo Classifier | |
| extension |
0..0 | Extension | ||
| url |
1..1 | uri | "http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-relates-to-classifier" | |
| value[x] |
1..1 | CodeableConcept | Value of extension | |
| Documentation for this format | ||||
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | RelatesTo Classifier | |
| id |
0..1 | id | Unique id for inter-element referencing | |
| extension |
0..0 | Extension Slice: Unordered, Open by value:url | ||
| url |
Σ | 1..1 | uri | "http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-relates-to-classifier" |
| value[x] |
Σ | 1..1 | CodeableConcept | 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()
|