# INxDownloadOptions Interface

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

## Syntax

```
[ValueClass]
public interface INxDownloadOptions
```

## Properties

| Name | Description |
| --- | --- |
| [BookmarkId](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxDownloadOptions.BookmarkId.htm#Qlik_Engine_INxDownloadOptions_BookmarkId) | Bookmark Id to apply before reducing the application.<br><br>JSON property name: qBookmarkId |
| [Expires](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxDownloadOptions.Expires.htm#Qlik_Engine_INxDownloadOptions_Expires) | Time in seconds for how long the download link is valid.<br><br>JSON property name: qExpires |
| [ServeOnce](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxDownloadOptions.ServeOnce.htm#Qlik_Engine_INxDownloadOptions_ServeOnce) | If the file should be deleted after served once.<br><br>JSON property name: qServeOnce |