schema.json

{
  "type": "object",
  "properties": {
    "urgent": {
      "type": "boolean",
      "description": "Is service blocked?"
    },
    "category": {
      "description": "Classify the issue.",
      "anyOf": [
        {
          "const": "billing",
          "description": "Payment issue"
        },
        {
          "const": "technical",
          "description": "Product malfunction"
        }
      ]
    },
    "severity": {
      "description": "Rate impact.",
      "anyOf": [
        {
          "const": 0,
          "description": "Minor"
        },
        {
          "const": 1,
          "description": "Disruptive"
        },
        {
          "const": 2,
          "description": "Blocking"
        }
      ]
    }
  },
  "required": [
    "urgent",
    "category",
    "severity"
  ],
  "additionalProperties": false
}