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3 changes: 2 additions & 1 deletion versions/3.1.1.md
Original file line number Diff line number Diff line change
Expand Up @@ -146,7 +146,8 @@ Data types in the OAS are based on the types supported by the [JSON Schema Speci
Note that `integer` as a type is also supported and is defined as a JSON number without a fraction or exponent part.
Models are defined using the [Schema Object](#schemaObject), which is a superset of JSON Schema Specification Draft 2020-12.

<a name="dataTypeFormat"></a>As defined by the [JSON Schema Validation vocabulary](https://tools.ietf.org/html/draft-bhutton-json-schema-validation-00#section-7.3), data types can have an optional modifier property: `format`.
<a name="dataTypeFormat"></a>As defined by the [JSON Schema Validation specification](https://tools.ietf.org/html/draft-bhutton-json-schema-validation-00#section-7.3), data types can have an optional modifier property: `format`. Note that by default, JSON Schema draft 2020-12 validators _do not_ validate `format`, but instead treat it as an annotation. Support for `format` validation, either in best-effort form with the [default `format-annotation` vocabulary](https://datatracker.ietf.org/doc/html/draft-bhutton-json-schema-validation-00#section-7.2.1), or with the less-commonly-implemented [`format-assertion` vocabulary](https://datatracker.ietf.org/doc/html/draft-bhutton-json-schema-validation-00#section-7.2.2), varies among JSON Schema validator implementations.

OAS defines additional formats to provide fine detail for primitive data types.

The formats defined by the OAS are:
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