Unknown Extension example
Carries an extension namespace the validator has never seen — and that MUST validate, with the namespace preserved on round-trip.
---# SPDX-FileCopyrightText: 2026 Damián Búho <damian.buho@proton.me>## SPDX-License-Identifier: CC-BY-4.0# SPDX-License-Identifier: MIT
# Positive fixture (YAML) — a consumer that has never heard of# `com.never-heard-of.this` MUST preserve this subtree on round-trip and# MUST NOT reject the document. (Section 3.7, Section 6.3.)
$schema: https://projectfile.org/schema/v1.json
identity: namespace: org.example name: unknown-extension
com: never-heard-of: this: whatever: "we want" deeply: nested: - 1 - 2"$schema" = "https://projectfile.org/schema/v1.json"
[identity]namespace = "org.example"name = "unknown-extension"
[com.never-heard-of.this]whatever = "we want"
[com.never-heard-of.this.deeply]nested = [ 1, 2 ]{ "$schema": "https://projectfile.org/schema/v1.json", "identity": { "namespace": "org.example", "name": "unknown-extension" }, "com": { "never-heard-of": { "this": { "whatever": "we want", "deeply": { "nested": [1, 2] } } } }}