# @ohos.app.ability.wantConstant (wantConstant)

The **wantConstant** module provides the actions, entities, and flags used in **Want** objects.

> **NOTE**
> 
> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.

## Modules to Import

```ts
import wantConstant from '@ohos.app.ability.wantConstant';
```

## wantConstant.Params

Enumerates the action constants of the **Want** object. **action** specifies the operation to execute.

**System capability**: SystemCapability.Ability.AbilityBase

| Name     | Value         | Description    |
| ------------ | ------------------ | ---------------------- |
|   DLP_PARAMS_SANDBOX    |ohos.dlp.params.sandbox  | Action of obtaining the sandbox flag.<br>**System API**: This is a system API and cannot be called by third-party applications. |
|   DLP_PARAMS_BUNDLE_NAME    |ohos.dlp.params.bundleName  |Action of obtaining the DLP bundle name.<br>**System API**: This is a system API and cannot be called by third-party applications. |
|   DLP_PARAMS_MODULE_NAME    |ohos.dlp.params.moduleName      |Action of obtaining the DLP module name.<br>**System API**: This is a system API and cannot be called by third-party applications. |
|   DLP_PARAMS_ABILITY_NAME   |ohos.dlp.params.abilityName      |Action of obtaining the DLP ability name.<br>**System API**: This is a system API and cannot be called by third-party applications. |
|   DLP_PARAMS_INDEX    |ohos.dlp.params.index      |Action of obtaining the DLP index.<br>**System API**: This is a system API and cannot be called by third-party applications. |
|   ABILITY_BACK_TO_OTHER_MISSION_STACK    |ability.params.backToOtherMissionStack      |Action of returning the ability to the mission stack.  |

## wantConstant.Flags

 Enumerates the flags that specify how the Want will be handled.

**System capability**: SystemCapability.Ability.AbilityBase

| Name                                | Value      | Description                                                        |
| ------------------------------------ | ---------- | ------------------------------------------------------------ |
| FLAG_AUTH_READ_URI_PERMISSION        | 0x00000001 | Indicates the permission to read the URI.                                 |
| FLAG_AUTH_WRITE_URI_PERMISSION       | 0x00000002 | Indicates the permission to write data to the URI.                                 |
| FLAG_INSTALL_ON_DEMAND               | 0x00000800 | Indicates that the specific ability will be installed if it has not been installed.                              |