[TD-TF] minutes - 27 March 2020

available at:
  https://www.w3.org/2020/03/27-wot-td-minutes.html

also as tet below.

Thanks a lot for taking the minutes, Sebastian!

Kazuyuki

---
   [1]W3C

      [1] http://www.w3.org/

                               - DRAFT -

                             WoT-WG - TD-TF

27 Mar 2020

   [2]Agenda

      [2] https://www.w3.org/WoT/IG/wiki/WG_WoT_Thing_Description_WebConf#March_27.2C_2020

Attendees

   Present
          Kaz_Ashimura, Sebastian_Kaebisch, Daniel_Peintner,
          Ege_Korkan, Taki_Kamiya, Michael_Koster,
          Tomoaki_Mizushima

   Regrets

   Chair
          Sebastian

   Scribe
          sebastian

Contents

     * [3]Topics
         1. [4]Agenda
         2. [5]Previous minutes
         3. [6]Virtual F2F minutes - TD part
         4. [7]REC status
         5. [8]T2TRG/OneDM debriefing
         6. [9]Issues
         7. [10]Efficient formats for TD
     * [11]Summary of Action Items
     * [12]Summary of Resolutions
     __________________________________________________________

   <kaz> scribenick: sebastian

Agenda

   Sebastian: presents the today's agenda

Previous minutes

   <kaz> [13]Mar-13 minutes

     [13] https://www.w3.org/2020/03/13-wot-td-minutes.html

   Sebastian: go over the minutes from the last time
   ... sk will ask Klaus regarding CoAP ontology
   ... it is approved to bring the minutes to public

Virtual F2F minutes - TD part

   <kaz> [14]https://www.w3.org/2020/03/16-wot-minutes.html

     [14] https://www.w3.org/2020/03/16-wot-minutes.html

   <Zakim> dape, you wanted to recall McCool mentioned task forces
   should also approve VF2F minutes

   <kaz> [15]https://www.w3.org/2020/03/17-wot-minutes.html

     [15] https://www.w3.org/2020/03/17-wot-minutes.html

   <kaz> [16]https://www.w3.org/2020/03/18-wot-minutes.html

     [16] https://www.w3.org/2020/03/18-wot-minutes.html

   <kaz> [17]https://www.w3.org/2020/03/19-wot-minutes.html

     [17] https://www.w3.org/2020/03/19-wot-minutes.html

   Sebastian: shows the minuts from the vf2f mmeting last week
   ... approved to share the minutes from vf2f with the public
   ... shows the minutes from the wednesday meeting of the Vf2f
   ... no objection to make it public
   ... same for the minutes for the 19th March
   ... ok to bring them to public

REC status

   Sebastian: next topic REC status

   <kaz> [18]diff version from PR

     [18] https://w3c.github.io/wot-thing-description/publication/rec/diff.html

   <kaz> [19]static HTML for REC publication

     [19] https://w3c.github.io/wot-thing-description/publication/rec/

   <kaz> (sk: goes through the changes and see if any problems)

   Sebastian: the diffs looks good

T2TRG/OneDM debriefing

   Sebastian: Ege / MK share a short summary of the T2TRG
   ... discussion about versioning
   ... points to the version feature of the TD
   ... we need more experience with that
   ... what happen when there is a typo fix?
   ... is there a new version number?
   ... there was some discussion about porperties, actions, events
   ... it is planned OneDM SDF shall be a IETF standard, though
   IETF is not traditionally suited for standardizing data formats

   Koster: there was Carsten Bormann. Discussion about version,
   what happen when there are some changes
   ... seems no conflict between OneDM SDF and TDT
   ... we can discuss this more in this round here
   ... there will be a presentation of TDT in the next T2T meeting
   ... meeting will be take place April 9th
   ... howver, MK will check this

   Sebastian: we should work on this topic together

   Koster: defenitly, there are also topics to use external
   vocabularies

   Sebastian: was there a discssion on JSON vs JSON-LD?

   Koster: there was same discussion as was done in WoT
   ... focus on a robust content
   ... participants don't want to use RDF
   ... there can be a maaping to RDF

   Sebastian: reminds me the discussion 2-3 years ago as well
   ... JSON-LD 1.1 is great since is quite close to 'normal' JSON
   ... should work together
   ... continue discussion in the next joint meeting

   Koster: SDF has more detail definition of devices
   ... we should discuss use cases of things that use deep
   structures
   ... we can work together on a common data model
   ... goal of SDF and OneDM is to define data model such as for
   air conditioner

   Sebastian: ask for testimonial from SmartThing

   Koster: working on that

   Sebastian: is there a use case / requirement document of the
   SDF / OneDM

   Koster: there is and make it public soon

   <kaz> [20]T2TRG draft minutes

     [20] https://hackmd.io/R9n8naQcTMeX0n1miV5_Yw?both

Issues

   next topic: github issue

   there is a new issue from the scripting api TF:
   [21]https://github.com/w3c/wot-thing-description/issues/887

     [21] https://github.com/w3c/wot-thing-description/issues/887

   Sebastian: we need more experience on that in PlugFests

   Koster: we do not describe the event handshake
   ... there is no metadata conainter that describe the
   demultiplex mechanism
   ... good topic for PlugFests
   ... can start with MQTT
   ... there many design issues

   Sebastian: we have to pick some common event-based protcols on
   the market and evaluate them in PlugFests
   ... need protocols that enables filtering

   Koster: this is a different level of application

   <Ege> [22]https://github.com/w3c/wot-scripting-api/issues/208

     [22] https://github.com/w3c/wot-scripting-api/issues/208

   Ege: there some examples given by Oracle

   [23]https://github.com/w3c/wot-testing/blob/master/data/testing
   /tests/2019-05/inputs/Oracle/oracle-simulators/Blue_Pump_Events
   .jsonld#L343

     [23] https://github.com/w3c/wot-testing/blob/master/data/testing/tests/2019-05/inputs/Oracle/oracle-simulators/Blue_Pump_Events.jsonld#L343

   Koster: seems Oracle borrows event mechanism from an existing
   approache
   ... using metadata to setup the connection

   Sebastian: we should collect common event mechanism and do some
   experiments in PlugFests

Efficient formats for TD

   next topic: Efficient Formats for TD

   Taki shows a presentation

   slides:
   [24]https://www.w3.org/WoT/IG/wiki/File:2020-03-17_Efficient_Fo
   rmat_for_TD_dape.PPTX

     [24] https://www.w3.org/WoT/IG/wiki/File:2020-03-17_Efficient_Format_for_TD_dape.PPTX

   Taki: we discuss this topic before
   ... we evaluated with EXI and CBOR
   ... there are pros and cons of both formats
   ... TD is not payload runtime document, mainly for metadata
   ... TD is Hypertext
   ... there are encodings at different layers
   ... there different use cases such as TD Directory and T2T
   ... next steps: we should recommend a couple of efficient
   encodings and not forbid the use of formats that will be
   available in the future (market will find the best option, but
   WoT should avoid a format chaos)
   ... we should experiment in PlugFest
   ... discussion should continue in
   [25]https://github.com/w3c/wot-thing-description/issues/885

     [25] https://github.com/w3c/wot-thing-description/issues/885

   Sebastian: there are use case from the eCl@ss group that use
   high structured metadata in TDs

   Ege: we have to idetify in which kind of constrained devices
   will have problems?

   <kaz> [adjourned]

Summary of Action Items

Summary of Resolutions

   [End of minutes]
     __________________________________________________________


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Received on Tuesday, 7 April 2020 05:39:51 UTC