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

# Create a new property

> Create a new property definition



## OpenAPI

````yaml /api-specs/cloud/taxonomy-api.json post /properties
openapi: 3.0.3
info:
  description: >-
    Microservice responsible for managing the Domino Taxonomy and Properties
    features
  title: Domino Taxonomy Microservice API
  termsOfService: http://swagger.io/terms/
  contact:
    name: Domino Data Lab
    url: https://tickets.dominodatalab.com/hc/en-us
    email: support@dominodatalab.com
  license:
    name: Apache 2.0
    url: http://www.apache.org/licenses/LICENSE-2.0.html
  version: '1.0'
servers:
  - url: https://mycluster.domino.tech/api/taxonomy/v1
    description: >-
      Replace 'mycluster.domino.tech' with your Domino cluster hostname. For
      Domino Cloud customers, that is `your-subdomain`.domino.tech (e.g.,
      acme.domino.tech). For self-hosted deployments, it is the hostname you
      reach the Domino UI at.
security: []
tags:
  - description: Manage taxonomy namespaces.
    name: Tagging - Namespaces
  - description: Manage tags within namespaces.
    name: Tagging - Tags
  - description: Assign, remove, and list tag assignments on entities.
    name: Tagging - Entity Tags
  - description: Look up entities by tag.
    name: Tagging - Entities
  - description: Fetch the full namespace + tag hierarchy.
    name: Tagging - Taxonomy Tree
  - description: Validate and import taxonomy data from a file.
    name: Tagging - Import
  - description: Export the current taxonomy to a file.
    name: Tagging - Export
  - description: Internal-only endpoints for service-account callers.
    name: Tagging - Internal
  - description: Manage property definitions and their groups.
    name: Properties - Definitions
  - description: Read and update an entity's property values.
    name: Properties - Values
  - description: Internal-only endpoints for service-account callers (properties).
    name: Properties - Internal
externalDocs:
  description: OpenAPI
  url: https://swagger.io/resources/open-api/
paths:
  /properties:
    post:
      tags:
        - Properties - Definitions
      summary: Create a new property
      description: Create a new property definition
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/server.CreatePropertyRequest'
        description: Property to create
        required: true
      responses:
        '201':
          description: Created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/taxonomy.Property'
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/server.HTTPError'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/server.HTTPError'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/server.HTTPError'
        '409':
          description: Conflict
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/server.HTTPError'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/server.HTTPError'
components:
  schemas:
    server.CreatePropertyRequest:
      type: object
      required:
        - allowedEntities
        - label
        - type
      properties:
        allowedEntities:
          type: array
          minItems: 1
          items:
            $ref: '#/components/schemas/taxonomy.EntityType'
        allowedValues:
          type: array
          items:
            $ref: '#/components/schemas/taxonomy.AllowedValue'
        description:
          type: string
        groupName:
          type: string
        label:
          type: string
        type:
          $ref: '#/components/schemas/taxonomy.PropertyType'
    taxonomy.Property:
      type: object
      properties:
        allowedEntities:
          type: array
          items:
            $ref: '#/components/schemas/taxonomy.EntityType'
        allowedValues:
          type: array
          items:
            $ref: '#/components/schemas/taxonomy.AllowedValue'
        createdAt:
          type: string
        createdBy:
          $ref: '#/components/schemas/taxonomy.User'
        description:
          type: string
        groupName:
          type: string
        id:
          type: string
        label:
          type: string
        status:
          $ref: '#/components/schemas/taxonomy.PropertyStatus'
        type:
          $ref: '#/components/schemas/taxonomy.PropertyType'
        updatedAt:
          type: string
        updatedBy:
          $ref: '#/components/schemas/taxonomy.User'
    server.HTTPError:
      type: object
      properties:
        message:
          type: string
    taxonomy.EntityType:
      type: string
      enum:
        - dataset
        - project
        - project_template
        - model
        - model_version
        - app
        - app_version
        - netapp_volume
        - environment
        - policy
        - policy_version
      x-enum-varnames:
        - EntityTypeDataset
        - EntityTypeProject
        - EntityTypeProjectTemplate
        - EntityTypeModel
        - EntityTypeModelVersion
        - EntityTypeApp
        - EntityTypeAppVersion
        - EntityTypeNetappVolume
        - EntityTypeEnvironment
        - EntityTypePolicy
        - EntityTypePolicyVersion
    taxonomy.AllowedValue:
      type: object
      properties:
        subfield:
          type: string
        value:
          type: string
    taxonomy.PropertyType:
      type: string
      enum:
        - text
        - number
        - date
        - boolean
        - url
        - user
        - organization
        - user_or_org
        - select
        - multi_select
      x-enum-varnames:
        - PropertyTypeText
        - PropertyTypeNumber
        - PropertyTypeDate
        - PropertyTypeBoolean
        - PropertyTypeURL
        - PropertyTypeUser
        - PropertyTypeOrganization
        - PropertyTypeUserOrOrg
        - PropertyTypeSelect
        - PropertyTypeMultiSelect
    taxonomy.User:
      type: object
      properties:
        userID:
          type: string
        username:
          type: string
    taxonomy.PropertyStatus:
      type: string
      enum:
        - active
        - deleted
      x-enum-varnames:
        - PropertyStatusActive
        - PropertyStatusDeleted

````

## Related topics

- [Properties](/cloud/platform-capabilities/core-concepts/knowledge-management/properties.md)
- [Create new volume](/api-reference/volumes/create-new-volume.md)
- [[DEPRECATED] Create a new Registered Model from an experiment run](/api-reference/registeredmodels/[deprecated]-create-a-new-registered-model-from-an-experiment-run.md)
- [Delete a property](/api-reference/properties--definitions/delete-a-property.md)