> For the complete documentation index, see [llms.txt](https://docs.truedat.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.truedat.io/v8.8/api-integrations/data-catalog-data-lineage-and-grants-apis/classifier.md).

# Classifier

## List classifiers for a system

> Retrieves classifiers for the selected system, visible to the current user.

```json
{"openapi":"3.0.0","info":{"title":"td-dd","version":"Truedat 8.8.2"},"paths":{"/api/systems/{system_id}/classifiers":{"get":{"description":"Retrieves classifiers for the selected system, visible to the current user.","operationId":"TdDdWeb.ClassifierController.index","parameters":[{"description":"System ID","in":"path","name":"system_id","required":true,"schema":{"type":"integer"}}],"responses":{"200":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ClassifierListResponse"}}},"description":"Classifier list response"},"401":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdUnauthorizedResponse"}}},"description":"Unauthorized"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdInternalServerErrorResponse"}}},"description":"Internal Server Error"}},"summary":"List classifiers for a system","tags":["Classifier"]}}},"components":{"schemas":{"ClassifierListResponse":{"additionalProperties":false,"properties":{"data":{"items":{"$ref":"#/components/schemas/Classifier"},"type":"array"}},"required":["data"],"title":"ClassifierListResponse","type":"object"},"Classifier":{"additionalProperties":false,"properties":{"filters":{"items":{"additionalProperties":true,"type":"object"},"type":"array"},"id":{"type":"integer"},"name":{"type":"string"},"rules":{"items":{"additionalProperties":true,"type":"object"},"type":"array"}},"required":["id","name"],"title":"Classifier","type":"object"},"TdDdUnauthorizedResponse":{"anyOf":[{"$ref":"#/components/schemas/TdDdUnauthorizedMessageResponse"},{"$ref":"#/components/schemas/TdDdUnauthorizedErrorResponse"}],"description":"Unauthorized response from auth plug or error view","title":"TdDdUnauthorizedResponse"},"TdDdUnauthorizedMessageResponse":{"additionalProperties":false,"properties":{"message":{"type":"string"}},"required":["message"],"title":"TdDdUnauthorizedMessageResponse","type":"object"},"TdDdUnauthorizedErrorResponse":{"properties":{"errors":{"properties":{"detail":{"type":"string"}},"type":"object"}},"required":["errors"],"title":"TdDdUnauthorizedErrorResponse","type":"object"},"TdDdInternalServerErrorResponse":{"additionalProperties":false,"properties":{"errors":{"additionalProperties":false,"properties":{"detail":{"type":"string"}},"required":["detail"],"type":"object"}},"required":["errors"],"title":"TdDdInternalServerErrorResponse","type":"object"}}}}
```

## Create a classifier for a system

> Creates a new classifier in the selected system.

```json
{"openapi":"3.0.0","info":{"title":"td-dd","version":"Truedat 8.8.2"},"paths":{"/api/systems/{system_id}/classifiers":{"post":{"description":"Creates a new classifier in the selected system.","operationId":"TdDdWeb.ClassifierController.create","parameters":[{"description":"System ID","in":"path","name":"system_id","required":true,"schema":{"type":"integer"}}],"requestBody":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ClassifierCreateRequest"}}},"description":"Classifier create payload","required":false},"responses":{"201":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ClassifierResponse"}}},"description":"Classifier created"},"401":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdUnauthorizedResponse"}}},"description":"Unauthorized"},"403":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdForbiddenResponse"}}},"description":"Forbidden"},"422":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdUnprocessableEntityObjectResponse"}}},"description":"Unprocessable Entity"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdInternalServerErrorResponse"}}},"description":"Internal Server Error"}},"summary":"Create a classifier for a system","tags":["Classifier"]}}},"components":{"schemas":{"ClassifierCreateRequest":{"additionalProperties":false,"properties":{"classifier":{"additionalProperties":false,"properties":{"filters":{"items":{"additionalProperties":true,"type":"object"},"nullable":true,"type":"array"},"name":{"type":"string"},"rules":{"items":{"additionalProperties":true,"type":"object"},"nullable":true,"type":"array"}},"required":["name"],"type":"object"}},"required":["classifier"],"title":"ClassifierCreateRequest","type":"object"},"ClassifierResponse":{"additionalProperties":false,"properties":{"data":{"$ref":"#/components/schemas/Classifier"}},"required":["data"],"title":"ClassifierResponse","type":"object"},"Classifier":{"additionalProperties":false,"properties":{"filters":{"items":{"additionalProperties":true,"type":"object"},"type":"array"},"id":{"type":"integer"},"name":{"type":"string"},"rules":{"items":{"additionalProperties":true,"type":"object"},"type":"array"}},"required":["id","name"],"title":"Classifier","type":"object"},"TdDdUnauthorizedResponse":{"anyOf":[{"$ref":"#/components/schemas/TdDdUnauthorizedMessageResponse"},{"$ref":"#/components/schemas/TdDdUnauthorizedErrorResponse"}],"description":"Unauthorized response from auth plug or error view","title":"TdDdUnauthorizedResponse"},"TdDdUnauthorizedMessageResponse":{"additionalProperties":false,"properties":{"message":{"type":"string"}},"required":["message"],"title":"TdDdUnauthorizedMessageResponse","type":"object"},"TdDdUnauthorizedErrorResponse":{"properties":{"errors":{"properties":{"detail":{"type":"string"}},"type":"object"}},"required":["errors"],"title":"TdDdUnauthorizedErrorResponse","type":"object"},"TdDdForbiddenResponse":{"additionalProperties":false,"properties":{"errors":{"additionalProperties":false,"properties":{"detail":{"type":"string"}},"required":["detail"],"type":"object"}},"required":["errors"],"title":"TdDdForbiddenResponse","type":"object"},"TdDdUnprocessableEntityObjectResponse":{"additionalProperties":false,"properties":{"errors":{"properties":{"detail":{"type":"string"}},"type":"object"}},"required":["errors"],"title":"TdDdUnprocessableEntityObjectResponse","type":"object"},"TdDdInternalServerErrorResponse":{"additionalProperties":false,"properties":{"errors":{"additionalProperties":false,"properties":{"detail":{"type":"string"}},"required":["detail"],"type":"object"}},"required":["errors"],"title":"TdDdInternalServerErrorResponse","type":"object"}}}}
```

## Delete a classifier

> Deletes the specified classifier from the selected system.

```json
{"openapi":"3.0.0","info":{"title":"td-dd","version":"Truedat 8.8.2"},"paths":{"/api/systems/{system_id}/classifiers/{id}":{"delete":{"description":"Deletes the specified classifier from the selected system.","operationId":"TdDdWeb.ClassifierController.delete","parameters":[{"description":"System ID","in":"path","name":"system_id","required":true,"schema":{"type":"integer"}},{"description":"Classifier ID","in":"path","name":"id","required":true,"schema":{"type":"integer"}}],"responses":{"204":{"description":"Classifier deleted"},"401":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdUnauthorizedResponse"}}},"description":"Unauthorized"},"403":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdForbiddenResponse"}}},"description":"Forbidden"},"500":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/TdDdInternalServerErrorResponse"}}},"description":"Internal Server Error"}},"summary":"Delete a classifier","tags":["Classifier"]}}},"components":{"schemas":{"TdDdUnauthorizedResponse":{"anyOf":[{"$ref":"#/components/schemas/TdDdUnauthorizedMessageResponse"},{"$ref":"#/components/schemas/TdDdUnauthorizedErrorResponse"}],"description":"Unauthorized response from auth plug or error view","title":"TdDdUnauthorizedResponse"},"TdDdUnauthorizedMessageResponse":{"additionalProperties":false,"properties":{"message":{"type":"string"}},"required":["message"],"title":"TdDdUnauthorizedMessageResponse","type":"object"},"TdDdUnauthorizedErrorResponse":{"properties":{"errors":{"properties":{"detail":{"type":"string"}},"type":"object"}},"required":["errors"],"title":"TdDdUnauthorizedErrorResponse","type":"object"},"TdDdForbiddenResponse":{"additionalProperties":false,"properties":{"errors":{"additionalProperties":false,"properties":{"detail":{"type":"string"}},"required":["detail"],"type":"object"}},"required":["errors"],"title":"TdDdForbiddenResponse","type":"object"},"TdDdInternalServerErrorResponse":{"additionalProperties":false,"properties":{"errors":{"additionalProperties":false,"properties":{"detail":{"type":"string"}},"required":["detail"],"type":"object"}},"required":["errors"],"title":"TdDdInternalServerErrorResponse","type":"object"}}}}
```