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::Greengrass::LoggerDefinition LoggerDefinitionVersion
<a name="aws-properties-greengrass-loggerdefinition-loggerdefinitionversion"></a>

<a name="aws-properties-greengrass-loggerdefinition-loggerdefinitionversion-description"></a> A logger definition version contains a list of [loggers](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-properties-greengrass-loggerdefinition-logger.html).

**Note**  
After you create a logger definition version that contains the loggers you want to deploy, you must add it to your group version. For more information, see [https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-group.html](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-group.html).

<a name="aws-properties-greengrass-loggerdefinition-loggerdefinitionversion-inheritance"></a> In an Amazon CloudFormation template, `LoggerDefinitionVersion` is the property type of the `InitialVersion` property in the [https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-loggerdefinition.html](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-loggerdefinition.html) resource.

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

### JSON
<a name="aws-properties-greengrass-loggerdefinition-loggerdefinitionversion-syntax.json"></a>

```
{
  "[Loggers](#cfn-greengrass-loggerdefinition-loggerdefinitionversion-loggers)" : [ Logger, ... ]
}
```

### YAML
<a name="aws-properties-greengrass-loggerdefinition-loggerdefinitionversion-syntax.yaml"></a>

```
  [Loggers](#cfn-greengrass-loggerdefinition-loggerdefinitionversion-loggers): 
    - Logger
```

## Properties
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`Loggers`  <a name="cfn-greengrass-loggerdefinition-loggerdefinitionversion-loggers"></a>
The loggers in this version.  
*Required*: Yes  
*Type*: Array of [Logger](aws-properties-greengrass-loggerdefinition-logger.md)  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

## See also
<a name="aws-properties-greengrass-loggerdefinition-loggerdefinitionversion--seealso"></a>
+ [LoggerDefinitionVersion](https://docs.amazonaws.cn/greengrass/v1/apireference/definitions-loggerdefinitionversion.html) in the * Amazon IoT Greengrass Version 1 API Reference *
+  [Amazon IoT Greengrass Version 1 Developer Guide](https://docs.amazonaws.cn/greengrass/v1/developerguide/)