This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::GameLiftStreams::StreamGroup DefaultApplication
<a name="aws-properties-gameliftstreams-streamgroup-defaultapplication"></a>

Represents the default Amazon GameLift Streams application that a stream group hosts.

## Syntax
<a name="aws-properties-gameliftstreams-streamgroup-defaultapplication-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-gameliftstreams-streamgroup-defaultapplication-syntax.json"></a>

```
{
  "[Arn](#cfn-gameliftstreams-streamgroup-defaultapplication-arn)" : {{String}},
  "[Id](#cfn-gameliftstreams-streamgroup-defaultapplication-id)" : {{String}}
}
```

### YAML
<a name="aws-properties-gameliftstreams-streamgroup-defaultapplication-syntax.yaml"></a>

```
  [Arn](#cfn-gameliftstreams-streamgroup-defaultapplication-arn): {{String}}
  [Id](#cfn-gameliftstreams-streamgroup-defaultapplication-id): {{String}}
```

## Properties
<a name="aws-properties-gameliftstreams-streamgroup-defaultapplication-properties"></a>

`Arn`  <a name="cfn-gameliftstreams-streamgroup-defaultapplication-arn"></a>
An [Amazon Resource Name (ARN)](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference-arns.html) that uniquely identifies the application resource. Example ARN: `arn:aws:gameliftstreams:us-west-2:111122223333:application/a-9ZY8X7Wv6`.   
*Required*: No  
*Type*: String  
*Pattern*: `^arn:aws:gameliftstreams:([^: ]*):([0-9]{12}):([^: ]*)$`  
*Minimum*: `1`  
*Maximum*: `128`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Id`  <a name="cfn-gameliftstreams-streamgroup-defaultapplication-id"></a>
An ID that uniquely identifies the application resource. Example ID: `a-9ZY8X7Wv6`.   
*Required*: No  
*Type*: String  
*Pattern*: `^[a-zA-Z0-9-]+$`  
*Minimum*: `1`  
*Maximum*: `32`  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)