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# AWS::AppIntegrations::EventIntegration EventFilter
<a name="aws-properties-appintegrations-eventintegration-eventfilter"></a>

The event integration filter.

## Syntax
<a name="aws-properties-appintegrations-eventintegration-eventfilter-syntax"></a>

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

### JSON
<a name="aws-properties-appintegrations-eventintegration-eventfilter-syntax.json"></a>

```
{
  "[Source](#cfn-appintegrations-eventintegration-eventfilter-source)" : String
}
```

### YAML
<a name="aws-properties-appintegrations-eventintegration-eventfilter-syntax.yaml"></a>

```
  [Source](#cfn-appintegrations-eventintegration-eventfilter-source): String
```

## Properties
<a name="aws-properties-appintegrations-eventintegration-eventfilter-properties"></a>

`Source`  <a name="cfn-appintegrations-eventintegration-eventfilter-source"></a>
The source of the events.  
*Required*: Yes  
*Type*: String  
*Pattern*: `^aws\.(partner\/.*|cases)$`  
*Minimum*: `1`  
*Maximum*: `256`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)