{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/weather-gov/refs/heads/main/json-structure/weather-gov-sigmet-structure.json",
  "name": "Sigmet",
  "description": "Sigmet schema from weather.gov API",
  "type": "object",
  "properties": {
    "id": {
      "type": "uri"
    },
    "issueTime": {
      "type": "datetime"
    },
    "fir": {
      "type": [
        "string",
        "null"
      ]
    },
    "atsu": {
      "$ref": "#/components/schemas/ATSUIdentifier"
    },
    "sequence": {
      "type": [
        "string",
        "null"
      ]
    },
    "phenomenon": {
      "type": [
        "string",
        "null"
      ],
      "format": "uri"
    },
    "start": {
      "type": "datetime"
    },
    "end": {
      "type": "datetime"
    }
  },
  "additionalProperties": false
}