{
  "$id": "https://schemas.ruter.no/adt/ota/api/v3.0/sensors/apc/apc.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Apc",
  "type": "object",
  "required": [
    "traceId",
    "eventTimestamp",
    "messageNumber",
    "doorRef",
    "alightingCount",
    "boardingCount",
    "categoryActivities"
  ],
  "description": "Raw-data from door-sensor for later evaluation.",
  "additionalProperties": true,
  "properties": {
    "traceId": {
      "$id": "#/properties/traceId",
      "$comment": "Added in version 2.5",
      "type": "string",
      "description": "A unique identifier to be able to trace this message. Also used to detect duplicate messages received."
    },
    "eventTimestamp": {
      "$id": "#/properties/eventTimestamp",
      "type": "string",
      "description": "As specified in the [ADT documentation.](https://adt.transhub.io). Reflects the current UTC time."
    },
    "messageNumber": {
      "$id": "#/properties/messageNumber",
      "$comment": "Added in version 2.1",
      "type": "number",
      "description": "Sequence number that should generated on the vehicle and increased by one for each new message. Used to validate consistency in the data stream."
    },
    "doorRef": {
      "$id": "#/properties/doorRef",
      "type": "string",
      "description": "Stable alfa-numeric reference that is unique within scope of vehicle (vehicle element/train set). Could be a door-number or a combination of coach number and door number."
    },
    "alightingCount": {
      "$id": "#/properties/alightingCount",
      "type": "number",
      "description": "Total number of alighting passengers detected by this sensor since the last APC message was produced."
    },
    "boardingCount": {
      "$id": "#/properties/boardingCount",
      "type": "number",
      "description": "Total number of boarding passengers detected by this sensor since the last APC message was produced."
    },
    "categoryActivities": {
      "$id": "#/properties/categoryActivities",
      "type": "array",
      "description": "A list describing APC activity at each individual door divided per handled object category.",
      "items": {
        "type": "object",
        "required": [
          "categoryRef",
          "alightingCount",
          "boardingCount"
        ],
        "properties": {
          "categoryRef": {
            "type": "string",
            "description": "Object class reference. Any of the following object categories.",
            "values": [
              "ADULT",
              "CHILD",
              "PRAM",
              "BIKE",
              "WHEELCHAIR",
              "UNKNOWN"
            ]
          },
          "alightingCount": {
            "type": "number",
            "description": "Number of alighting of this category detected by this sensor since the last APC message was produced."
          },
          "boardingCount": {
            "type": "number",
            "description": "Number of boarding of this category detected by this sensor since the last APC message was produced."
          }
        }
      }
    }
  }
}