{
  "$id": "https://example.com/person.schema.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema#",
  "type": "object",
  "definitions": {
    "example": {
      "$anchor": "example",
      "type": "string",
      "enum": [
        "A", "B"
      ]
    }
  }
}