uniqueItems : Boolean

uniqueItems

Boolean

If this keyword is set to the boolean value true, the instance validates successfully if all of its elements are unique.

Kind Assertion
Applies To Array
Dialect 2020-12
Introduced In Draft 2
Vocabulary Validation
Specification https://json-schema.org/draft/2020-12/json-schema-validation.html#section-6.4.3
Metaschema https://json-schema.org/draft/2020-12/meta/validation
Also see