---
title: "GET /system_class/{system_class}"
method: GET
path: "/system_class/{system_class}"
tags: ["Entities Endpoint"]
---

# GET /system_class/{system_class}

`GET /system_class/{system_class}`

Retrieves entities based on their OpenAtlas class name.

## Path parameters

- `system_class` 'all' | 'acquisition' | 'activity' | 'administrative_unit' | 'appellation' | 'artifact' | 'bibliography' | 'creation' | 'edition' | 'event' | 'external_reference' | 'feature' | 'file' | 'group' | 'human_remains' | 'modification' | 'move' | 'person' | 'place' | 'production' | 'reference_system' | 'source' | 'source_translation' | 'stratigraphic_unit' | 'type' | 'type_tools', required

## Query parameters

- `download` boolean
- `count` boolean
- `show` string[]
- `format` 'lp' | 'lpx' | 'geojson' | 'geojson-v2' | 'pretty-xml' | 'n3' | 'turtle' | 'nt' | 'xml'
- `export` 'csv' | 'csvNetwork'
- `column` 'id' | 'name' | 'cidoc_class' | 'system_class' | 'begin_from' | 'begin_to' | 'end_from' | 'end_to'
- `sort` 'asc' | 'desc'
- `first` integer
- `last` integer
- `page` integer
- `limit` integer
- `type_id` integer[]
- `relation_type` string[]
- `locale` 'ca' | 'de' | 'en' | 'es' | 'fr'
- `centroid` boolean

## Response `200`

Success

## Other responses

- `404` — Something went wrong. Please consult the error message.

## Changes

- **2025-04-01** `a7203bcb1d40` — 1 breaking
  - added `#/components/schemas/SearchModel` to the `results/items/` response property `oneOf` list for the response status `200`
- **2025-04-01** `b640f0339736` — 27 breaking, 1 warning, 8 info
  - removed the enum value `begin` from the `query` request parameter `column`
  - removed the enum value `checkbox` from the `query` request parameter `column`
  - removed the enum value `class` from the `query` request parameter `column`
  - removed the enum value `content` from the `query` request parameter `column`
  - …32 more

[Change history](https://skmtc.dev/craws/apis/openatlas-api/changes/system_class/:system_class/get.md)

---

[API](https://skmtc.dev/craws/apis/openatlas-api.md) · [All operations](https://skmtc.dev/craws/apis/openatlas-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/craws/openatlas-api/revisions/e1ffb1bb26dd/schema)