<trackbot> Date: 17 June 2015

current state Wiki:

What is relevant to TD?

<Darko_Anicic> who is here?

Darko: last week recap. 2 talks: (1) W3C/OGC Spatial Data on the Web working Group and (2) SenML

relevance of SenML for TD?

Soumya: SenML used to encode sensor data. To put in parallel with CoRE Link Format

Presentation from Jaime about IPSO Smart Objects

Jaime: IoT issues already solved by Web techs.

On the Web, stateless interactions/focus on resources -> everything is a resource

apply this model to constrained devices -> CoAP

difference with the standard Web: OBSERVE (pub-sub), resource directory, IPv6 native support (6LowPAN)

Web Linking for IoT with CoRE Link (provides a .well-known URI)

query string params for discovery, 2 formats: "application/link-format", "application/link-format+json"

OMA Lightweight M2M (LWM2M)

based on CoAp

targets constrained device management

Objects stored on the devices, access to device objects from a LWM2M server

object-based model

IPSO defines a set of objects

(on top of LWM2M, see stack on slide 7)

IP for Smart Objects (IPSO)

goal is to achieve PnP between devices and applications

transport protocol-independant

CoAP, LWM2M, MQTT...

encoding-independent

JSON, TVL, SenML

tested over CoAP -> implemented, claim it works.

ARM, Intel, Ericsson, a.o, involved in this tests.

basic idea: objects are sensors/actuators

resource structure: <object ID>/<#instance>/<resource ID>

reusable IDs

fits to CoAP. But is also compatible with MQTT

(resource ID = topic)

Ex. of IPSO Humidity Sensor

extensible: new extensible object based on this Humidity Sensor (ex: make a prop. writable/readable)

composite objects (based on LWM2M : mapping physical objects with real-life thigs)

IPSO Object Linking -> new LWM2M data type: Object Link. Serialized in SenML

Roadmap: deal with UPnP, schema.org, BLE/ZigBee

<scribe> Done: Drafts for SO Data Model Design & Expansion Pack for Basic Objects

Missing: Draft for Domain Specific Objects

Sebastian: publicly accessible?

Jaime: Basic Objects, yes. Links will be addded to the slides

Dan: mechanism to define own domains?

Jaime: Objects IDs are registered with the OMNA

Sebastian: IDs not human-friendly.

Jaime: Translation layer can be implemented. Independent

Sebastian: targetted devices?

Jaime: broad focus. Started with small micro-controllers. But Rasp Pi introduced later

Darko: where to get a list of available objects?

Jaime: 17 objects in the spec, 20 coming soon. Most important is the application-specific objects

Darko: Interoperability with reusable objects?

Jaime: through root objects. Ex. of 2 systems using different Humidity Sensors

Still have a common interface through the root object

Sebastian: objects properties have a type. Where are they defined? What about complex types?

Jaime: basic types defined by LWM2M.

Complex types -> multiple resources?

Sebastian: example of a RGB LED

Jaime: to check.

Sebastian: wrap-up + next week. (1) carry on the discusion about IPSO, (2)Presentation about embedded semantics (ESWC publication). TODO match technologies reviewed until now with use cases.

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Present: DanhLePhuoc Soumya Danh Darko Jaime Joerg Kathy Lonay Victor Dan Arne Joel Sebastian

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Found Date: 17 Jun 2015
Guessing minutes URL: http://www.w3.org/2015/06/17-wot-td-minutes.html
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