# Initiator
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Container element that identifies who initiated the multipart upload. 

## Contents
<a name="API_Initiator_Contents"></a>

 ** DisplayName **   <a name="AmazonS3-Type-Initiator-DisplayName"></a>
  
This functionality is not supported for directory buckets.
Type: String  
Required: No

 ** ID **   <a name="AmazonS3-Type-Initiator-ID"></a>
If the principal is an AWS account, it provides the Canonical User ID. If the principal is an IAM User, it provides a user ARN value.  
 **Directory buckets** - If the principal is an AWS account, it provides the AWS account ID. If the principal is an IAM User, it provides a user ARN value.
Type: String  
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\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/s3-2006-03-01/Initiator) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/s3-2006-03-01/Initiator) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/s3-2006-03-01/Initiator) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon Simple Storage Service (S3). To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query AmazonS3` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).