schemas/json/problem-object-rfc9457.json could specify additionalProperties=true

[rkovarik]

Area with issue?

JSON Schema

✔️ Expected Behavior

As suggested in verified errata for RFC 9457:
...it would have been nice to have "additionalProperties": true explicitly stated.

❌ Actual Behavior

Some implementations of validators default additionalProperties to null / empty schema.
While we might say it's wrong implementation of the validators, due to compatibility with their current impls, we should not expect this to be fixed.

YAML or JSON file that does not work.

{
    "type": "https://example.com/probs/out-of-credit",
    "title": "You do not have enough credit.",
    "detail": "Your current balance is 30, but that costs 50.",
    "instance": "/account/12345/msgs/abc",
    "balance": 30,
    "accounts": ["/account/12345",
                 "/account/67890"]
}

IDE or code editor.

None

Are you making a PR for this?

Yes, I will create a PR.