{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "definitions": {
    "pets": {
      "type": "object",
      "properties": {
        "amount": {
          "type": "integer",
          "maximum": 8,
          "exclusiveMaximum": false,
          "enum": [ 4 ]
        }
      }
    }
  }
}