{
  "$schema": "../../test-schema.json",
  "registry": {
    "http://example.com/": {
      "extends": [{ "id": "http://example.com/0", "title": "First!" }]
    }
  },
  "tests": [
    {
      "ref": "http://example.com/0",
      "target": { "id": "http://example.com/0", "title": "First!" }
    }
  ]
}