[
  {
    "title": "`format` is an annotation",
    "schema": {
      "format": "email"
    },
    "subjects": [
      {
        "instance": "foo@bar.com",
        "assertions": [
          {
            "location": "#",
            "keyword": "format",
            "expected": ["email"]
          }
        ]
      }
    ]
  }
]