Tag - Amazon OpenSearch Service
ContentsSee Also
This documentation is a draft for private preview for regions in the AWS European Sovereign Cloud. Documentation content will continue to evolve. Published: January 6, 2026.

Tag

A tag (key-value pair) for an Amazon OpenSearch Service resource.

Contents

Key

The tag key. Tag keys must be unique for the domain to which they are attached.

Type: String

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

Pattern: .*

Required: Yes

Value

The value assigned to the corresponding tag key. Tag values can be null and don't have to be unique in a tag set. For example, you can have a key value pair in a tag set of project : Trinity and cost-center : Trinity

Type: String

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

Pattern: .*

Required: Yes

See Also

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