JSON-Schema

JSON-Schema API

Notes

additionalProperties

https://github.com/OAI/OpenAPI-Specification/pull/1548

• JSON-Schema. additionalProperties defaults to true.
• OpenAPI 2.0. additionalProperties defaults to false.
• OpenAPI 3.0.2. "Consistent with JSON Schema, additionalProperties defaults to true." https://github.com/OAI/OpenAPI-Specification/blob/v3.0.2-dev/versions/3.0.2.md

A simplified version of OpenAPI can introduce a global configuration field additionalProperties. A strict version of OpenAPI should require the additionalProperties property if type is object.

Default values

if Schema defines a default value then a validation step may produce a value of type which has no undefined values. For example

interface A {
    a?: string
}

transforms into

interface A {
    a: string
}

Multi API versions in one file