Cognite Unit Systems API

openapi: 3.1.0
info:
  title: Cognite 3D Asset Mapping Unit Systems API
  description: "# Introduction\nThis is the reference documentation for the Cognite API with\nan overview of all the available methods.\n\n# Postman\nSelect the **Download** button to download our OpenAPI specification to get started.\n\nTo import your data into Postman, select **Import**, and the Import modal opens.\nYou can import items by dragging or dropping files or folders. You can choose how to import your API and manage the import settings in **View Import Settings**.\n\nIn the Import Settings, set the **Folder organization** to **Tags**, select\n**Enable optional parameters** to turn off the settings, and select **Always inherit authentication** to turn on the settings. Select **Import**.\n\nSet the Authorization to **Oauth2.0**. By default, the settings are for Open Industrial Data. Navigate to [Cognite Hub](https://hub.cognite.com/open-industrial-data-211) to understand how to get the credentials for use in Postman.\n\nFor more information, see [Getting Started with Postman](https://developer.cognite.com/dev/guides/postman/).\n\n# Pagination\nMost resource types can be paginated, indicated by the field `nextCursor` in the response.\nBy passing the value of `nextCursor` as the cursor you will get the next page of `limit` results.\nNote that all parameters except `cursor` has to stay the same.\n\n# Parallel retrieval\nAs general guidance, Parallel Retrieval is a technique that should be used when due to query complexity, retrieval of data in a single request is significantly slower than it would otherwise be for a simple request.  Parallel retrieval does not act as a speed multiplier on optimally running queries.  By parallelizing such requests, data retrieval performance can be tuned to meet the client application needs. \n\nCDF supports parallel retrieval through the `partition` parameter, which has the format `m/n` where `n` is the amount of partitions you would like to split the entire data set into.\nIf you want to download the entire data set by splitting it into 10 partitions, do the following in parallel with `m` running from 1 to 10:\n  - Make a request to `/events` with `partition=m/10`.\n  - Paginate through the response by following the cursor as explained above. Note that the `partition` parameter needs to be passed to all subqueries.\n\nProcessing of parallel retrieval requests is subject to concurrency quota availability. The request returns the `429` response upon exceeding concurrency limits. See the Request throttling chapter below.\n\nTo prevent unexpected problems and to maximize read throughput, you should at most use 10 partitions. \nSome CDF resources will automatically enforce a maximum of 10 partitions.\nFor more specific and detailed information, please read the ```partition``` attribute documentation for the CDF resource you're using.  \n\n# Requests throttling\nCognite Data Fusion (CDF) returns the HTTP `429` (too many requests) response status code when project capacity exceeds the limit.\n\nThe throttling can happen:\n  - If a user or a project sends too many (more than allocated) concurrent requests.\n  - If a user or a project sends a too high (more than allocated) rate of requests in a given amount of time.\n\nCognite recommends using a retry strategy based on truncated exponential backoff to handle sessions with HTTP response codes 429.\n\nCognite recommends using a reasonable number (up to 10) of  `Parallel retrieval` partitions.\n\nFollowing these strategies lets you slow down the request frequency to maximize productivity without having to re-submit/retry failing requests.\n\nSee more [here](https://docs.cognite.com/dev/concepts/resource_throttling).\n\n# API versions\n## Version headers\nThis API uses calendar versioning, and version names follow the `YYYYMMDD` format.\nYou can find the versions currently available by using the version selector at the top of this page.\n\nTo use a specific API version, you can pass the `cdf-version: $version` header along with your requests to the API.\n\n## Beta versions\nThe beta versions provide a preview of what the stable version will look like in the future.\nBeta versions contain functionality that is reasonably mature, and highly likely to become a part of the stable API.\n\nBeta versions are indicated by a `-beta` suffix after the version name. For example, the beta version header for the\n2023-01-01 version is then `cdf-version: 20230101-beta`.\n\n## Alpha versions\nAlpha versions contain functionality that is new and experimental, and not guaranteed to ever become a part of the stable API.\nThis functionality presents no guarantee of service, so its use is subject to caution.\n\nAlpha versions are indicated by an `-alpha` suffix after the version name. For example, the alpha version header for\nthe 2023-01-01 version is then `cdf-version: 20230101-alpha`."
  version: v1
  contact:
    name: Cognite Support
    url: https://support.cognite.com
    email: support@cognite.com
servers:
- url: https://{cluster}.cognitedata.com/api/v1/projects/{project}
  description: The URL for the CDF cluster to connect to
  variables:
    cluster:
      enum:
      - api
      - az-tyo-gp-001
      - az-eastus-1
      - az-power-no-northeurope
      - westeurope-1
      - asia-northeast1-1
      - gc-dsm-gp-001
      default: api
      description: The CDF cluster to connect to
    project:
      default: publicdata
      description: The CDF project name.
security:
- oidc-token:
  - https://{cluster}.cognitedata.com/.default
- oauth2-client-credentials:
  - https://{cluster}.cognitedata.com/.default
- oauth2-open-industrial-data:
  - https://api.cognitedata.com/.default
- oauth2-auth-code:
  - https://{cluster}.cognitedata.com/.default
tags:
- name: Unit Systems
  description: 'Unit system is a collection of default units for different quantities.

    This API provides a list of supported unit systems and their associated quantities and respective unit.'
paths:
  /units/systems:
    get:
      tags:
      - Unit Systems
      summary: List all unit systems
      description: List all unit systems.
      operationId: listUnitSystems
      responses:
        '200':
          description: Response with a list of unit systems
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ViewList_UnitSystem_'
      x-code-samples:
      - lang: JavaScript
        label: JavaScript SDK
        source: const units = await client.units.listUnitSystems();
      - lang: Python
        label: Python SDK
        source: 'res = client.units.systems.list()

          '
components:
  schemas:
    UnitSystem:
      properties:
        name:
          type: string
          title: Name
          description: Name of the unit system
          example: SI
        quantities:
          items:
            $ref: '#/components/schemas/UnitSystemQuantity'
          type: array
          title: Quantities
          description: List of quantities and their default units
          example:
          - name: Temperature
            unitExternalId: temperature:deg_c
      additionalProperties: false
      type: object
      required:
      - name
      - quantities
      title: UnitSystem
      description: 'Unit System: A set of default units designated per quantity.


        An example being:


        - SI: Temperature in Kelvin, Pressure in Pa


        - SI (Engineering): Temperature in degrees Celsius, Pressure in bar


        - Imperial: Temperature in degrees Fahrenheit, Pressure in psi'
    ViewList_UnitSystem_:
      properties:
        items:
          items:
            $ref: '#/components/schemas/UnitSystem'
          type: array
          title: Items
      additionalProperties: false
      type: object
      required:
      - items
      title: ViewList[UnitSystem]
    UnitSystemQuantity:
      properties:
        name:
          type: string
          title: Name
          description: Name of the quantity
          example: Temperature
        unitExternalId:
          type: string
          title: UnitExternalId
          description: Default unit for the quantity
          example: temperature:deg_c
      additionalProperties: false
      type: object
      required:
      - name
      - unitExternalId
      title: UnitSystemQuantity
  securitySchemes:
    oidc-token:
      type: http
      scheme: bearer
      bearerFormat: OpenID Connect or OAuth2 token
      description: Access token issued by the CDF project's configured identity provider. Access token must be an OpenID Connect token, and the project must be configured to accept OpenID Connect tokens. Use a header key of 'Authorization' with a value of 'Bearer $accesstoken'. The token can be obtained through any flow supported by the identity provider.
    oauth2-client-credentials:
      type: oauth2
      description: Access token issued by the CDF project's configured identity provider. Access token must be an OpenID Connect token, and the project must be configured to accept OpenID Connect tokens. Use a header key of 'Authorization' with a value of 'Bearer $accesstoken'. The token can be obtained through any flow supported by the identity provider.
      flows:
        clientCredentials:
          tokenUrl: https://your-idps.token.url/
          scopes:
            default: https://{cluster}.cognitedata.com/.default
    oauth2-auth-code:
      type: oauth2
      description: Access token issued by the CDF project's configured identity provider. Access token must be an OpenID Connect token, and the project must be configured to accept OpenID Connect tokens. Use a header key of 'Authorization' with a value of 'Bearer $accesstoken'. The token can be obtained through any flow supported by the identity provider.
      flows:
        authorizationCode:
          authorizationUrl: https://your-idps.authorization.url/
          tokenUrl: https://your-idps.token.url/
          scopes:
            default: https://{cluster}.cognitedata.com/.default
    oauth2-open-industrial-data:
      type: oauth2
      description: Auth flow for Open Industrial Data. Get your client secret from https://hub.cognite.com/open-industrial-data-211.
      flows:
        clientCredentials:
          tokenUrl: https://login.microsoftonline.com/48d5043c-cf70-4c49-881c-c638f5796997/oauth2/v2.0/token
          scopes:
            default: https://api.cognitedata.com/.default
    org-oidc-token:
      type: openIdConnect
      openIdConnectUrl: https://auth.cognite.com/.well-known/openid-configuration
      description: 'Access token issued by the Cognite authorization server, and valid for the target organization. The token must

        be an OpenID Connect token, and it can be obtained by performing an OIDC login flow toward `auth.cognite.com`.

        This is a single URL for all CDF organizations.'
x-tagGroups:
- name: Changelog
  tags:
  - Changelog
- name: Organizations and projects
  tags:
  - Organizations
  - Projects
- name: Identity and access management
  tags:
  - Principals
  - Groups
  - Security categories
  - Sessions
  - Token
  - User profiles
  - Project Deletion Reporting
- name: Data modeling
  tags:
  - Data Modeling
  - Data models
  - Spaces
  - Views
  - Containers
  - Nodes
  - Instances
  - Statistics
  - Streams
  - Records
- name: Asset-centric data model
  tags:
  - Assets
  - Time series
  - Synthetic Time Series
  - Data point subscriptions
  - Events
  - Files
  - Sequences
  - Geospatial
  - Seismic
- name: 3D
  tags:
  - 3D Models
  - 3D Model Revisions
  - 3D Files
  - 3D Asset Mapping
  - 3D Contextualization
  - 3D Jobs
  - 3D Migration
  - 3D Scenes
- name: Contextualization
  tags:
  - Entity matching
  - Entity matching pipelines
  - Engineering diagrams
  - Vision
  - Advanced joins
- name: Cognite AI
  tags:
  - Agents
  - Skills
  - Chat Completions
  - Document AI
  - Models
- name: Documents
  tags:
  - Documents
  - Document preview
- name: Data ingestion
  tags:
  - Raw
  - Extraction Pipelines
  - Extraction Pipelines Runs
  - Extraction Pipelines Config
  - Extractors
- name: Data organization
  tags:
  - Data sets
  - Data domains
  - Data products
  - Rule sets
  - Labels
  - Relationships
  - Annotations
- name: Transformations
  tags:
  - Transformations
  - Transformation Jobs
  - Transformation Schedules
  - Transformation Notifications
  - Query
  - Schema
- name: Functions
  tags:
  - Functions
  - Function calls
  - Function schedules
- name: Hosted Extractors
  tags:
  - Sources
  - Jobs
  - Destinations
  - Mappings
- name: PostgreSQL Gateway
  tags:
  - Postgres Gateway Users
  - Postgres Gateway Tables
- name: SAP Writeback
  tags:
  - SAP Instances
  - SAP Endpoints
  - Schema Mappings
  - Writeback Requests
- name: Data workflows
  tags:
  - Workflows
  - Workflow versions
  - Workflow executions
  - Workflow triggers
  - Tasks
  - Workers
- name: Simulators
  tags:
  - Simulators
  - Simulator Integrations
  - Simulator Models
  - Simulator Routines
  - Simulation Runs
  - Simulator Logs
- name: Units
  tags:
  - Units
  - Unit Systems
- name: ''
  tags:
  - ''