WoT (W3C Web of Things)

Compile HoloScript compositions to W3C Web of Things Thing Descriptions — the open standard for IoT device interoperability.

Overview

The WoT compiler generates Thing Description (TD) JSON-LD documents conforming to the W3C WoT standard. Compatible with all WoT-compliant platforms and runtimes.

Quick Start

holo compile --target wot scene.holo --out thing-description.jsonld

HoloScript IoT → WoT Mapping

HoloScript	WoT
@iot_sensor	WoT Property (read-only)
@actuator	WoT Action
@digital_twin	WoT Thing with shadow
@telemetry	WoT Event
@mqtt_bridge	WoT Form (MQTT binding)

Example

composition "SmartLight" {
  object "Light" {
    @iot_sensor
    @actuator
    @digital_twin

    properties {
      brightness: number  // 0-100
      color: string       // hex color
      on: boolean
    }

    actions {
      turn_on() {}
      turn_off() {}
      set_brightness(level: number) {}
    }
  }
}

Compiles to:

{
  "@context": "https://www.w3.org/2019/wot/td/v1",
  "@type": "Thing",
  "id": "urn:holoscript:SmartLight:Light",
  "title": "Light",
  "properties": {
    "brightness": { "type": "number", "minimum": 0, "maximum": 100 },
    "color": { "type": "string" },
    "on": { "type": "boolean" }
  },
  "actions": {
    "turn_on": {},
    "turn_off": {},
    "set_brightness": {
      "input": { "type": "number" }
    }
  }
}

Supported Bindings

• HTTP/REST
• MQTT
• CoAP
• WebSocket

See Also

• DTDL (Azure IoT) — Azure Digital Twins format
• IoT Traits — All IoT/sensor traits