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

The tags for the resource. The metadata that you apply to a resource to help you categorize and organize them. Each tag consists of a key and an optional value, both of which you define. Tag keys can have a maximum character length of 128 characters, and tag values can have a maximum length of 256 characters.

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

 ** Key **   <a name="config-Type-Tag-Key"></a>
One part of a key-value pair that make up a tag. A key is a general label that acts like a category for more specific tag values.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Required: No

 ** Value **   <a name="config-Type-Tag-Value"></a>
The optional part of a key-value pair that make up a tag. A value acts as a descriptor within a tag category (key).  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 256.  
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/config-2014-11-12/Tag) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/config-2014-11-12/Tag) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/config-2014-11-12/Tag)