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Do the elements of 'required' array need to be defined in 'properties' dictionary in JSON schema?

+2

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In a JSON schema, do the required properties need to be a subset of properties?

E.g. is this a valid schema, even though cookies isn't mentioned in properties?

{
  "type": "object",
  "properties": {
    "tea": {
      "type": "string"
    }
  },
  "required": [
    "tea",
    "cookies"
  ]
}

json json-schema

posted 3 months ago

CC BY-SA 4.0

3mo ago

Iizuki‭

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According to my reading of the JSON Schema Spec, the answer is no. required array can contain elements which are not in the properties dictionary.

The example schema in question seems to be valid.

Semantically it means that the cookies property must exist for the JSON to pass validation, but it doesn't matter what type of property it is.