# Tag
<a name="API_Tag"></a>

A map of key-value pairs associated to an OpenSearch Serverless resource.

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

 ** key **   <a name="opensearchserverless-Type-Tag-key"></a>
The key to use in the tag.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Required: Yes

 ** value **   <a name="opensearchserverless-Type-Tag-value"></a>
The value of the tag.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 256.  
Required: Yes

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

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/opensearchserverless-2021-11-01/Tag) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/opensearchserverless-2021-11-01/Tag) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/opensearchserverless-2021-11-01/Tag)