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

Definition of the key/value pair for a tag.

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

 ** key **   <a name="bedrock-Type-Tag-key"></a>
Key for the tag.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `[a-zA-Z0-9\s._:/=+@-]*`   
Required: Yes

 ** value **   <a name="bedrock-Type-Tag-value"></a>
Value for the tag.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 256.  
Pattern: `[a-zA-Z0-9\s._:/=+@-]*`   
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/bedrock-2023-04-20/Tag) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-2023-04-20/Tag) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-2023-04-20/Tag)