{
  "$id": "https://schemas.ruter.no/adt/ota/api/v4.x/sensors/simple-location/simple-location.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "SimpleLocation",
  "type": "object",
  "description": "Simplified position data for metro vehicles. Published upon receipt of a position message from the train, regardless of whether the message is received through CBTC or CMCS.",
  "required": [
    "traceId",
    "eventTimestamp",
    "messageNumber",
    "latitudeDegree",
    "longitudeDegree",
    "dataSource"
  ],
  "additionalProperties": true,
  "properties": {
    "traceId": {
      "$id": "#/properties/traceId",
      "type": "string",
      "description": "A unique identifier - UUID",
      "example": "f47ac10b-58cc-4372-a567-0e02b2c3d479"
    },
    "eventTimestamp": {
      "$id": "#/properties/eventTimestamp",
      "type": "string",
      "description": "As specified in the ADT documentation. Reflects the UTC time of the position fix. Millisecond precision is preferred, if available.",
      "example": "2025-04-11T14:32:45.123Z"
    },
    "messageNumber": {
      "$id": "#/properties/messageNumber",
      "type": "integer",
      "description": "Sequence number, increased by one for each new message. Used to validate consistency in the data stream.",
      "example": 1542
    },
    "latitudeDegree": {
      "$id": "#/properties/latitudeDegree",
      "type": "number",
      "description": "Latitude coordinate in decimal degrees (WGS84).",
      "example": 59.911491
    },
    "longitudeDegree": {
      "$id": "#/properties/longitudeDegree",
      "type": "number",
      "description": "Longitude coordinate in decimal degrees (WGS84).",
      "example": 10.757933
    },
    "dataSource": {
      "$id": "#/properties/dataSource",
      "type": "string",
      "enum": ["CBTC", "CMCS"],
      "description": "The source system that provided the position data. CBTC = Communications-Based Train Control, CMCS = Central Monitoring and Control System.",
      "example": "CBTC"
    }
  }
}