{
  "openapi": "3.1.0",
  "info": {
    "title": "Train Travel API",
    "description": "Find and book train trips.",
    "version": "1.0.0",
    "contact": {
      "name": "Train Support",
      "url": "https://example.com/support",
      "email": "[email protected]"
    },
  },
  // ...
}