{
  "$id": "https://example.com/person.schema.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Person",
  "type": "object",
  "properties": {
    "firstName": {
      "type": "string"
    },
    "lastName": {
      "type": "string"
    },
    "age": {
      "type": "integer",
      "minimum": 0
    }
  },
  "oneOf": [
    {
      "properties": {
        "firstName": {
          "const": "John"
        }
      }
    },
    {
      "properties": {
        "lastName": {
          "const": "Doe"
        }
      }
    }
  ]
}