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v3.1.0: rephrase data-type section because format keyword can be used for any data type. #2302

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Aug 27, 2020
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v3.1.0: rephrase data-type section because format keyword can be used for any data type. #2302

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The JSON schema specification states the format keyword can be used f…
sebastien-rosset Aug 1, 2020
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The JSON schema specification states the format keyword can be used f…
sebastien-rosset Aug 1, 2020
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11 changes: 3 additions & 8 deletions versions/3.1.0.md
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Expand Up @@ -139,17 +139,12 @@ It is RECOMMENDED that the root OpenAPI document be named: `openapi.json` or `op

### <a name="dataTypes"></a>Data Types

Primitive data types in the OAS are based on the types supported by the [JSON Schema Specification Draft 2019-09](http://json-schema.org/draft/2019-09/json-schema-core.html#rfc.section.4.2).
Data types in the OAS are based on the types supported by the [JSON Schema Specification Draft 2019-09](http://json-schema.org/draft/2019-09/json-schema-core.html#rfc.section.4.2).
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 2019-09.

<a name="dataTypeFormat"></a>Primitives have an optional modifier property: `format`, which is defined by JSON Schema.
OAS uses several known additional formats to define in fine detail the data type being used.
However, to support documentation needs, the `format` property is an open `string`-valued property, and can have any value.
Additional formats MAY be used even though undefined by either JSON Schema or this specification.
Types that are not accompanied by a `format` property follow the type definition in the JSON Schema. Tools that do not recognize a specific `format` MAY default back to the `type` alone, as if the `format` is not specified.

Note that by default, JSON Schema validators will not attempt to validate the `format` keyword. https://json-schema.org/draft/2019-09/release-notes.html#format-vocabulary
<a name="dataTypeFormat"></a>As defined by JSON Schema, data types can have an optional modifier property: `format`.
OAS defines additional formats to provide fine detail for primitive data types.

The formats defined by the OAS are:

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