Tag - AWS Identity and Access Management


A structure that represents user-provided metadata that can be associated with an IAM resource. For more information about tagging, see Tagging IAM resources in the IAM User Guide.



The key name that can be used to look up or retrieve the associated value. For example, Department or Cost Center are common choices.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: [\p{L}\p{Z}\p{N}_.:/=+\-@]+

Required: Yes


The value associated with this tag. For example, tags with a key name of Department could have values such as Human Resources, Accounting, and Support. Tags with a key name of Cost Center might have values that consist of the number associated with the different cost centers in your company. Typically, many resources have tags with the same key name but with different values.


AWS always interprets the tag Value as a single string. If you need to store an array, you can store comma-separated values in the string. However, you must interpret the value in your code.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 256.

Pattern: [\p{L}\p{Z}\p{N}_.:/=+\-@]*

Required: Yes

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: