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# Resource: Categories

# Type: Category Object

# Link: https://dev.wix.com/docs/api-reference/business-management/online-programs/categories/category-object.md

## Description: A reusable, site-level classification for Online Programs.

Categories exist independently of Programs and remain available when they have no Program assignments.

## Schema:

```json
 Type: Category Object | type: Category
 Description: A reusable, site-level classification for Online Programs.

Categories exist independently of Programs and remain available when they have no Program assignments.
       - name: id  | type: string | description: Category ID.
           - name: value  | type: string | description: 
       - name: revision  | type: string | description: Revision number, which increments by 1 each time the Category is updated. To prevent conflicting changes, the current `revision` must be passed when updating the Category.
           - name: value  | type: string | description: 
       - name: createdDate  | type: string | description: Date and time the Category was created.
           - name: seconds  | type: string | description: 
           - name: nanos  | type: number | description: 
       - name: updatedDate  | type: string | description: Date and time the Category was last updated.
       - name: label  | type: string | description: Category's display label. The primary-language label must be unique within the site. Localized reads return the Wix Multilingual translation when one exists, and otherwise fall back to the primary label.
       - name: assignedTo  | type: Array<string> | description: IDs of Programs assigned to this Category. For routine assignment changes, use [Bulk Assign Categories to Program](https://dev.wix.com/docs/api-reference/business-management/online-programs/categories/bulk-assign-categories-to-program.md), whose 10-Category-per-Program check is best-effort. Direct writes to `assignedTo` through Create Category, Bulk Create Categories, or Update Category bypass that check; callers using them must keep each Program at or below 10 Categories. Relationship updates are eventually consistent across the Program Categories and Programs APIs.
       - name: extendedFields  | type: ExtendedFields | description: Custom field data for the Category. [Extended fields](https://dev.wix.com/docs/rest/articles/getting-started/extended-fields.md) must be configured in the app dashboard for `wix.achievements.categories.v3.category` before they can be accessed with API calls.
           - name: namespaces  | type: object | description: Extended field data. Each key corresponds to the namespace of the app that created the extended fields. The value of each key is structured according to the schema defined when the extended fields were configured.  You can only access fields for which you have the appropriate permissions.  Learn more about [extended fields](https://dev.wix.com/docs/rest/articles/getting-started/extended-fields.md).

```