{
  "$id": "https://example.com/person.schema.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Person",
  "type": "object",
  "properties": {
    "firstName": {
      "type": "string",
      "description": "The person's first name.",
      "title": "Person"
    },
    "lastName": {
      "type": "string",
      "description": "The person's last name.",
      "title": "Person"
    }
  },
  "patternProperties": {
    "$[a-c][0-9]^": {
      "type": "object",
      "description": "Review of a paper size.",
      "title": "paperSize",
      "required": ["rating", "review"],
      "properties": {
        "rating": {
          "type": "integer",
          "title": "Rating",
          "description": "Numerical rating for paper size."
        },
        "review": {
          "type": "string",
          "title": "Review",
          "description": "Narrative review of the paper size."
        }
      }
    }
  }
}