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

# <Chunk> element

> <Chunk> element

Defines a *chunk*, which is a collection of files that should be installed as a group.

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## Syntax

```xml theme={null}
<Chunk
  Marker = string
  Id = string 
  Devices = string
  Languages = string
  Tags = string>
</Chunk>  
```

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### Attributes

#### Marker

Indicates that all chunks up to and including this chunk in the layout XML file are required before the title can launch. The only accepted value for the `Marker` attribute is "Launch". Note that all chunks that occur before the marked chunk in the manifest are required for launch, regardless of their IDs.

#### Id

Required. The identifier for a chunk. A title can use this ID to query for the status of installation and to modify the order of installation at runtime.

#### Devices

Declares the types of devices to which the content in a specific chunk applies.

#### Languages

Declares the language to which the content in a chunk applies.

#### Tags

Allows you to mark groups of chunks as related. This simplifies checking whether the chunks that are needed to run a title are all present on the user's system. This attribute is also used to group chunks into Features.

The order of chunks in the final image follows the order of all chunks in the layout xml document, top to bottom. Consequently, this is also the default order of installation.

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## Remarks

[MakePkg.exe](/build/core-features/common/packaging/deployment/makepkg) scans for certain files in your package and moves them to a special *registration* chunk. Among these files are *MicrosoftGame.config*, any images referenced within *MicrosoftGame.config*, and *Resources.pri*, if present. You can manually lay out these files in the *layout.xml* file by specifying "Registration" in the `Id` attribute for the chunk that contains these files.

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## Information on elements

| Relationship   | Element name                                                                               |
| -------------- | ------------------------------------------------------------------------------------------ |
| Parent element | [Package](/build/core-features/common/packaging/deployment/deployment-element-package)     |
| Child element  | [FileGroup](/build/core-features/common/packaging/deployment/deployment-element-filegroup) |

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## Example

```xml theme={null}
<Chunk Id="1234" Marker="Launch" Languages="en" Devices="Anaconda" Tags="Campaign1">
  <FileGroup DestinationPath="\Campaign1\Anaconda\en" SourcePath="X:\Campaign1\Anaconda\en" Include="*.*"/>
</Chunk>  
```

## See also

[Deployment package schema](/build/core-features/common/packaging/deployment/atoc-deployment-schema)


## Related topics

- [Deployment package schema and streaming install tools](/build/core-features/common/packaging/deployment/index.md)
- [Error codes](/reference/errorcodes.md)
- [<Package> element](/build/core-features/common/packaging/deployment/deployment-element-package.md)
- [<FileGroup> element](/build/core-features/common/packaging/deployment/deployment-element-filegroup.md)
- [XPackageChunkAvailabilityCallback](/reference/system/xpackage/functions/xpackagechunkavailabilitycallback.md)