{
  "$id": "https://example.com/circular.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Circular reference Schema",
  "type": "object",
  "properties": {
    "person": {
      "$ref": "#/definitions/a"
    }
  },
  "definitions": {
    "a": {
      "type": "object",
      "properties": {
        "a1" : {
          "$ref": "#/definitions/b"
        }
      }
    },
    "b": {
      "type": "string",
      "$ref": "#/definitions/c",
      "description": "Description from b"
    },
    "c": {
      "type": "string",
      "$ref": "#/definitions/a/properties/a1",
      "description": "Description from c",
      "default": "Default from c"
    }
  }
}