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# AWS::KinesisFirehose::DeliveryStream OutputFormatConfiguration
<a name="aws-properties-kinesisfirehose-deliverystream-outputformatconfiguration"></a>

Specifies the serializer that you want Firehose to use to convert the format of your data before it writes it to Amazon S3. This parameter is required if `Enabled` is set to true.

## Syntax
<a name="aws-properties-kinesisfirehose-deliverystream-outputformatconfiguration-syntax"></a>

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

### JSON
<a name="aws-properties-kinesisfirehose-deliverystream-outputformatconfiguration-syntax.json"></a>

```
{
  "[Serializer](#cfn-kinesisfirehose-deliverystream-outputformatconfiguration-serializer)" : {{Serializer}}
}
```

### YAML
<a name="aws-properties-kinesisfirehose-deliverystream-outputformatconfiguration-syntax.yaml"></a>

```
  [Serializer](#cfn-kinesisfirehose-deliverystream-outputformatconfiguration-serializer): {{
    Serializer}}
```

## Properties
<a name="aws-properties-kinesisfirehose-deliverystream-outputformatconfiguration-properties"></a>

`Serializer`  <a name="cfn-kinesisfirehose-deliverystream-outputformatconfiguration-serializer"></a>
Specifies which serializer to use. You can choose either the ORC SerDe or the Parquet SerDe. If both are non-null, the server rejects the request.  
*Required*: No  
*Type*: [Serializer](aws-properties-kinesisfirehose-deliverystream-serializer.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)