{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "topic": {
      "type": "string",
      "enum": [
        "technology",
        "health",
        "finance",
        "education",
        "entertainment",
        "sports",
        "politics",
        "science",
        "business",
        "lifestyle"
      ],
      "description": "Classification into one of 10 categories"
    }
  },
  "required": ["topic"]
}