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uap3:AppExtension
Declares an app extensibility point of type windows.appExtension. This element indicates which categories of extensions the app intends to consume and/or host.
Element hierarchy
<Package>
└─ <Applications>
└─ <Application>
└─ <Extensions>
└─ <uap3:Extension>
└─ <uap3:AppExtension>
Syntax
<uap3:AppExtension
Name = 'A required string with a value between 2 and 65519 characters in length that consists of alphanumeric characters, periods (except for the first character), and dashes only.'
Id = 'A required string with a value between 2 and 39 characters in length that consists of alphanumeric characters, periods (except for the first character), and dashes only.'
PublicFolder = 'An optional string between 1 and 256 characters in length that cannot contain these characters: <, >, :, ", |, ?, or *.'
DisplayName = 'A required string between 1 and 256 characters in length. This string is localizable.'
Description = 'An optional string between 1 and 2048 characters in length.' >
<!-- Child elements -->
uap3:Properties?
</uap3:AppExtension>
Key
? optional (zero or one)
Attributes
| Attribute | Description | Data type | Required | Default value |
|---|---|---|---|---|
| Name | The type of extension that the app intends to consume and/or host. | A string with a value between 2 and 65519 characters in length that consists of alphanumeric characters, periods (except for the first character), and dashes only. | Yes | |
| Id | The entry point by which the host app accesses the extension category instance, if there are multiple entry points. | A string with a value between 2 and 39 characters in length that consists of alphanumeric characters, periods (except for the first character), and dashes only. | Yes | |
| PublicFolder | The folder that the instance declares as the location where a host can have read access to files through a broker. | An optional string between 1 and 256 characters in length that cannot contain these characters: <, >, :, ", |, ?, or *. | No | |
| DisplayName | A friendly name for the app extension that can be displayed to users. | A string between 1 and 256 characters in length. This string is localizable. | Yes | |
| Description | The description of the app | An optional string between 1 and 2048 characters in length. | No |
Child elements
| Child element | Description |
|---|---|
| uap3:Properties | Contains opaque XML that represents custom, extension-specific information that is simply stored and not read by the operating system. The information is only read by the host app. |
Parent elements
| Parent element | Description |
|---|---|
| uap3:Extension | Declares an extensibility point for the app. |
Requirements
| Item | Value |
|---|---|
| Namespace | http://schemas.microsoft.com/appx/manifest/uap/windows10/3 |
| Minimum OS Version | Windows 10 version 1607 (Build 14393) |
Remarks
Examples
The following example indicates that the app hosts or consumes the low-performance browser extension
<Package
xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3"
IgnorableNamespaces="... uap3">
<Applications>
<Application>
<Extensions>
<uap3:Extension
Category="windows.appExtension">
<uap3:AppExtension
Name="com.microsoft.browser.ext"
Id="Extension.Low.Performance"
PublicFolder="public\lowperf"
DisplayName="Low Performance Extension"/>
</uap3:Extension>
</Extensions>
</Application>
</Applications>
</Package>
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