{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://developer.siemens.com/schemas/building-point",
  "title": "BuildingDataPoint",
  "description": "Represents a building automation data point — a sensor, setpoint, or actuator in a Siemens building management system.",
  "type": "object",
  "required": ["id", "name", "type"],
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique identifier of the building data point"
    },
    "name": {
      "type": "string",
      "description": "Human-readable name of the data point"
    },
    "description": {
      "type": "string",
      "description": "Description of what the data point measures or controls"
    },
    "type": {
      "type": "string",
      "enum": [
        "analog-input",
        "analog-output",
        "binary-input",
        "binary-output",
        "multistate-input",
        "multistate-output"
      ],
      "description": "BACnet point type classification"
    },
    "unit": {
      "type": "string",
      "description": "Engineering unit for the measurement (e.g., degC, Pa, m3/h, %)"
    },
    "currentValue": {
      "type": "object",
      "description": "Current real-time value and quality",
      "properties": {
        "value": {
          "description": "Current measured or commanded value"
        },
        "timestamp": {
          "type": "string",
          "format": "date-time"
        },
        "quality": {
          "type": "string",
          "enum": ["good", "bad", "uncertain"]
        }
      }
    },
    "writable": {
      "type": "boolean",
      "description": "Whether this point accepts write commands from the API"
    },
    "equipmentId": {
      "type": "string",
      "description": "Identifier of the equipment this point belongs to"
    }
  }
}