A custom key-value pair associated with a resource such as a CloudTrail trail.
The key in a key-value pair. The key must be must be no longer than 128 Unicode characters. The key must be unique for the resource to which it applies.
The value in a key-value pair of a tag. The value must be no longer than 256 Unicode characters.
For more information about using this API in one of the language-specific AWS SDKs, see the following: