# AddKeyEntry
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This object defines one key that will be added with the [ addKeys](https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/CloudWatch-Logs-Transformation.html#CloudWatch-Logs-Transformation-addKey) processor.

## Contents
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 ** key **   <a name="CWL-Type-AddKeyEntry-key"></a>
The key of the new entry to be added to the log event  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Required: Yes

 ** value **   <a name="CWL-Type-AddKeyEntry-value"></a>
The value of the new entry to be added to the log event  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Required: Yes

 ** overwriteIfExists **   <a name="CWL-Type-AddKeyEntry-overwriteIfExists"></a>
Specifies whether to overwrite the value if the key already exists in the log event. If you omit this, the default is `false`.  
Type: Boolean  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/logs-2014-03-28/AddKeyEntry) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/logs-2014-03-28/AddKeyEntry) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/logs-2014-03-28/AddKeyEntry)