# CommonPrefix
<a name="API_CommonPrefix"></a>

Container for all (if there are any) keys between Prefix and the next occurrence of the string specified by a delimiter. CommonPrefixes lists keys that act like subdirectories in the directory specified by Prefix. For example, if the prefix is notes/ and the delimiter is a slash (/) as in notes/summer/july, the common prefix is notes/summer/. 

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

 ** Prefix **   <a name="AmazonS3-Type-CommonPrefix-Prefix"></a>
Container for the specified common prefix.  
Type: String  
Required: No

## See Also
<a name="API_CommonPrefix_SeeAlso"></a>

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/CommonPrefix) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/s3-2006-03-01/CommonPrefix) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/s3-2006-03-01/CommonPrefix) 

## 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).