Amazon OpenSearch Service API · Schema
TagKey
A string of length from 1 to 128 characters that specifies the key for a Tag. Tag keys must be unique for the Elasticsearch domain to which they are attached.
AnalyticsAWSElasticsearchSearch
A string of length from 1 to 128 characters that specifies the key for a Tag. Tag keys must be unique for the Elasticsearch domain to which they are attached.