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

# ID Number

> The ID number component validates whether an ID number is correctly formatted, but does not verify its legality or validity. It supports multilingual content, variable binding, and multiple status options. Note that this component is only available on specific pages and encrypts data at rest to ensure security.

| Feature             | Free plan     | Basic edition | Professional edition | Dedicated edition             |
| ------------------- | ------------- | ------------- | -------------------- | ----------------------------- |
| ID number component | Not supported | Not supported | Not supported        | Supported (dedicated storage) |

## Overview

The ID number component validates whether an ID number is correctly formatted, **but does not verify its legality or validity.**

| **Configuration item** | **Description**                                                                                      | **Attribute** |
| ---------------------- | ---------------------------------------------------------------------------------------------------- | ------------- |
| **Title**              | Sets the display title of the component. Supports multilingual content and variable binding.         | lable         |
| **Placeholder**        | Sets the default content shown in the input box. Supports multilingual content and variable binding. | placeholder   |
| **Description**        | The description shown below the component, typically used for supplementary information.             | tips          |
| **Status**             | Sets the component status. Four states are supported: Normal, Disabled, Read-only, and Hidden.       | behavior      |

## Notes

* The ID number component appears only on the form details page and the data management list page (the data management page does not support Export, Import, or edit actions). It can be used on the form design page, but is not supported or displayed in any other scenario.
* The ID number component automatically validates the format of the ID number. Because the data is sensitive, the system stores it in encrypted form. Handle the data securely on your end as well.