> ## Documentation Index
> Fetch the complete documentation index at: https://docs.open-metadata.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Create a Classification

> Create a new classification for organizing tags

# Create a Classification

Create a new classification for organizing tags into categories.

## Body Parameters

<ParamField body="name" type="string" required>
  Name of the classification. Must be unique.
</ParamField>

<ParamField body="displayName" type="string">
  Human-readable display name for the classification.
</ParamField>

<ParamField body="description" type="string">
  Description of the classification in Markdown format.
</ParamField>

<ParamField body="mutuallyExclusive" type="boolean" default="false">
  If `true`, only one tag from this classification can be applied to an entity at a time.
</ParamField>

<ParamField body="owners" type="array">
  Array of owner references (users or teams) to assign to the classification.

  <Expandable title="properties">
    <ParamField body="id" type="string">
      UUID of the owner entity.
    </ParamField>

    <ParamField body="type" type="string">
      Type of owner entity (e.g., `user`, `team`).
    </ParamField>

    <ParamField body="name" type="string">
      Name of the owner entity.
    </ParamField>
  </Expandable>
</ParamField>

<ParamField body="provider" type="string">
  Provider of the classification: `user` (custom) or `system` (built-in).
</ParamField>

<RequestExample dropdown>
  ```python POST /v1/classifications theme={null}
  from metadata.sdk import configure
  from metadata.sdk.entities import Classifications
  from metadata.generated.schema.api.classification.createClassification import CreateClassificationRequest

  configure(
      host="https://your-company.open-metadata.org/api",
      jwt_token="your-jwt-token"
  )

  request = CreateClassificationRequest(
      name="Certification",
      description="Certifying Data Asset will provide the users with a clear idea of...",
      mutuallyExclusive=True
  )

  classification = Classifications.create(request)
  print(f"Created: {classification.fullyQualifiedName}")
  ```

  ```java POST /v1/classifications theme={null}
  import static org.openmetadata.sdk.fluent.Classifications.*;

  // Create using builder pattern
  var classification = Classifications.builder()
      .name("Certification")
      .description("Certifying Data Asset will provide the users with a clear idea of...")
      .mutuallyExclusive(true)
      .create();
  ```

  ```bash POST /v1/classifications theme={null}
  curl -X POST "{base_url}/api/v1/classifications" \
    -H "Authorization: Bearer {access_token}" \
    -H "Content-Type: application/json" \
    -d '{
      "name": "Certification",
      "description": "Certifying Data Asset will provide the users with a clear idea of...",
      "mutuallyExclusive": true,
      "owners": []
    }'
  ```
</RequestExample>

<ResponseExample>
  ```json Response theme={null}
  {
    "id": "06d90883-6be9-4f7e-9475-753f10a95e94",
    "name": "Certification",
    "fullyQualifiedName": "Certification",
    "description": "Certifying Data Asset will provide the users with a clear idea of...",
    "version": 0.1,
    "updatedAt": 1769982619610,
    "updatedBy": "admin",
    "deleted": false,
    "owners": [],
    "provider": "system",
    "mutuallyExclusive": true
  }
  ```
</ResponseExample>

***

## Returns

Returns the created classification object with all specified properties and system-generated fields.

## Response

<ResponseField name="id" type="string">
  Unique identifier for the classification (UUID format).
</ResponseField>

<ResponseField name="name" type="string">
  Classification name.
</ResponseField>

<ResponseField name="fullyQualifiedName" type="string">
  Fully qualified name of the classification.
</ResponseField>

<ResponseField name="displayName" type="string">
  Human-readable display name.
</ResponseField>

<ResponseField name="description" type="string">
  Description of the classification in Markdown format.
</ResponseField>

<ResponseField name="mutuallyExclusive" type="boolean">
  Whether tags in this classification are mutually exclusive.
</ResponseField>

<ResponseField name="provider" type="string">
  Provider of the classification: `user` or `system`.
</ResponseField>

<ResponseField name="owners" type="array" optional>
  List of owners assigned to the classification.
</ResponseField>

<ResponseField name="version" type="number">
  Version number for the entity (starts at 0.1).
</ResponseField>

***

## Create or Update (PUT)

Use `PUT /v1/classifications` instead of `POST` to perform an upsert. If a classification with the same `fullyQualifiedName` already exists, it will be updated; otherwise, a new classification is created. The request body is the same as `POST`.

```bash theme={null}
curl -X PUT "{base_url}/api/v1/classifications" \
  -H "Authorization: Bearer {access_token}" \
  -H "Content-Type: application/json" \
  -d '{ ... same body as POST ... }'
```

<Note>
  `PUT` will not return a `409` conflict error if the entity already exists -- it will update the existing entity instead.
</Note>

***

## Error Handling

| Code  | Error Type              | Description                                              |
| ----- | ----------------------- | -------------------------------------------------------- |
| `400` | `BAD_REQUEST`           | Invalid request body or missing required fields          |
| `401` | `UNAUTHORIZED`          | Invalid or missing authentication token                  |
| `403` | `FORBIDDEN`             | User lacks permission to create classifications          |
| `409` | `ENTITY_ALREADY_EXISTS` | Classification with same name already exists (POST only) |