# Delete Relation

## API Name

API Name: Element – Delete Relation

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## Overview

This API deletes an existing relation between a source element and a target element.

MBSE Core uses this API to:

* Remove structural links
* Remove dependencies
* Remove associations
* Maintain model consistency during synchronization

Connector responsibility:

* For the given source element and relation details:
  * Delete the corresponding relation in the end system.
* If the end system models relations as elements:
  * Delete the relation element.
* If the end system models relations implicitly:
  * Remove the link using the appropriate API.
* Ensure deletion is scoped to the given project and branch.

***

### API URI

```bash
DELETE: /mbse/api/1.0/elements/{elementId}/relations
    ?projectId={projectId}
    &elementTypeId={elementTypeId}
    &branchId={branchId}
    &relationType={relationType}
    &targetElementId={targetElementId}
    &targetElementTypeId={targetElementTypeId}
```

***

### Path Parameters

| Name      | Mandatory | Type   | Description                               |
| --------- | --------- | ------ | ----------------------------------------- |
| elementId | True      | String | ID of the source element in the relation. |

***

### URI Parameters

| Name          | Mandatory | Type   | Description                                                                |
| ------------- | --------- | ------ | -------------------------------------------------------------------------- |
| projectId     | True      | String | ID of the project.                                                         |
| elementTypeId | True      | String | ID of the source element type.                                             |
| branchId      | False     | String | ID of the branch. If omitted, default branch behavior applies.             |
| relationType  | True      | String | Type of relation (e.g., Satisfied By, Verifies, Abstraction, dependency, r |


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