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# AWS::Logs::Transformer CopyValue
<a name="aws-properties-logs-transformer-copyvalue"></a>

This processor copies values within a log event. You can also use this processor to add metadata to log events by copying the values of the following metadata keys into the log events: `@logGroupName`, `@logGroupStream`, `@accountId`, `@regionName`. 

For more information about this processor including examples, see [ copyValue](https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/CloudWatch-Logs-Transformation-Processors.html#CloudWatch-Logs-Transformation-copyValue) in the *CloudWatch Logs User Guide*.

## Syntax
<a name="aws-properties-logs-transformer-copyvalue-syntax"></a>

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

### JSON
<a name="aws-properties-logs-transformer-copyvalue-syntax.json"></a>

```
{
  "[Entries](#cfn-logs-transformer-copyvalue-entries)" : [ CopyValueEntry, ... ]
}
```

### YAML
<a name="aws-properties-logs-transformer-copyvalue-syntax.yaml"></a>

```
  [Entries](#cfn-logs-transformer-copyvalue-entries): 
    - CopyValueEntry
```

## Properties
<a name="aws-properties-logs-transformer-copyvalue-properties"></a>

`Entries`  <a name="cfn-logs-transformer-copyvalue-entries"></a>
An array of `CopyValueEntry` objects, where each object contains the information about one field value to copy.   
*Required*: Yes  
*Type*: Array of [CopyValueEntry](aws-properties-logs-transformer-copyvalueentry.md)  
*Minimum*: `1`  
*Maximum*: `5`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)