AW: [TD-TF] TD web meeting details & agenda

Hi Dave,

I'm very sorry for my delayed response. For Wednesday I plan to have a TD call again. Are you able to attend this time? In that case I would reserve an agenda point where you can give an overview about your work.

Another question: Do you plan to attend the plugfest next week? If I understand you correctly, you can simply transform a JSON representation of a TD into a JSON-LD representation such as from the current WoT working assumption. This can be a good basis for interoperability tests with other participants as well as to learn from each other. What do you think?

Best regards
Sebastian




Von: Dave Raggett [mailto:dsr@w3.org]
Gesendet: Dienstag, 17. Januar 2017 19:59
An: Kaebisch, Sebastian (CT RDA NEC WOS-DE); public web of things
Betreff: Re: [TD-TF] TD web meeting details & agenda


Hi Sebastian,

I won't be able to make tomorrow's call but did want to provide a status report for the work I am doing on JSON and RDF for thing descriptions.

I lost some work over Christmas and have been catching up. I've explored a very broad range of use cases to identify the core data types needed for the RDF models of things from the perspective of applications running on an application platform. This includes the suite of OCF and oneM2M specifications. I plan to extend this to Bluetooth and OPC-UA.  I've also worked on validation of RDF using an extension to augmented transition networks, an approach that lends itself to graphic representation and editing of rules. This would enable us to formalize thing descriptions independently of the serialization (e.g. JSON, JSON-LD, turtle, N-triples, XML, etc.). I am planning further work on formalizing service compositions and validating thing descriptions against semantic models of domain constraints. I have also defined a formal mapping from JSON to RDF using a context free grammar as an alternative to JSON-LD.

To keep the connection between applications and IoT platforms as clean as possible, I have used RDF to name the IoT platform along with the means to declare what metadata is needed for the application platform to pass to the drivers for particular IoT platforms. This will allow thing descriptions to be validated in respect to the IoT platform that a given thing is bound to. Such platforms include OCF, oneM2M, Bluetooth, OPC-UA, and so forth. Each IoT platform specifies how to use the protocols and communications technologies it is built upon.

Note that Paul Murdock is launching a follow on to last year's joint white paper on semantic interoperability, and I will forward an invitation to the WoT IG and WG lists. This will be based upon individual contributions, with the resulting document forwarded to a range of IoT alliances and SDOs for their consideration.  I've also agreed to draft a charter for a semantics task force for the WoT IG, and expect to have a first draft available next week. I would like to emphasize the need for fine grained semantic descriptions to enable vendors to describe the unique differentiating features of their products. Standards for ontologies will need to take this into account.

I am sure that people will ask why work on JSON when the IG has been using JSON-LD for the plugfests. The answer is that whilst JSON-LD is simple for simple use cases, it is awkward for more complex use cases, especially, those involving application declared data types.  I believe that Web developers will prefer to use JSON rather than JSON-LD once they see the consequences. However, we can, and probably should, standardize the use of RDF for thing descriptions independently of the way the descriptions are serialized.

Best regards,

      Dave
On 17/01/17 16:33, Kaebisch, Sebastian wrote:
Dear WoT members,

tomorrow I plan to have a TD web meeting. Please find webex details and draft agenda below. Please let me know if you have some additional topic points.
Best regards
Sebastian

Agenda

1)      Open TD issues regarding TD (https://github.com/w3c/wot/issues?q=is%3Aissue+is%3Aopen+label%25)

2)      Plans and ideas for the plugfest with the TD

3)      TD topics for breakout sessions

TD-Restructuring-2am-Boston
-----------------------------
Wednesday, November 16, 2016
- 11pm-1d US Pacific
- 2am US Eastern
- 7am UTC
- 7am UK
- 8am Europe
- 3pm China
- 4pm Korea/Japan

Host: Kazuyuki Ashimura
Meeting number: 642 149 379
Meeting password: wrNsQ355
Meeting link: https://mit.webex.com/mit/j.php?MTID=m28122b1ca616019e919463d333de0242
Audio connection: +1-617-324-0000 US Toll Number
Access code: 642 149 379






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Dave Raggett <dsr@w3.org><mailto:dsr@w3.org> http://www.w3.org/People/Raggett

W3C lead for the Web of things