# Definition

To update or modify the definition of an Object Type, choose **Components > Object Types** in the navigational menu, then choose the Object Type. The Object Type detail view will default to the **Definition tab**, which includes:

* **Type Name (ID):** required, permanent unique identifier for the Object Type, used throughout the Tenant Workspace UI, throughout your solution, and as the Tenant API endpoint for the Object Type
* **Display Name:** editable, this required field is used throughout the Tenant Workspace UI
* **Description:** optional, used in the Tenant Workspace UI and in Swagger documentation of your Tenant API to describe the Object Type
* **Display Name (Plural):** optional, include a special spelling to use in the Tenant Workspace UI and Swagger documentation of your Tenant API when a plural name is appropriate
* **Category:** optional, used only in the Tenant Workspace UI, for basic organization and browsing of Records via the left-hand navigational menu
  * Unset or Default (will display the Object Type and its Records in the Data menu item)
  * Data (recommended for frequently changed, or ever-growing sets of data, such as User or Transaction records)
  * Setting (recommended for infrequently changed, more fixed data sets, for instance Zip Codes)

#### Deleting an Object Type

On the Object Type Definition tab in the Tenant Workspace UI, there is a Danger Zone to delete the Object Type. Once confirmed, the Object Type and all Records of that Object Type will be immediately deleted, an operation which cannot be undone.