24 May 2017


See also: IRC log


Dave_Raggett, Danh_Le_Phuoc, Kaz_Ashimura, Michael_McCool, Angel_Retamar, Daniel_Peintner, Johannes_Hund, Kunihiko_Toumura, Masato_Ohura, Matthias_Kovatsch, Michael_Koster, Sebastian_Kaebisch, Takeshi_Yamada, Taki_Kamiya, Keiichi_Tokuyama, Uday_Davuluru, Katsuyoshi_Naka, Federico_Sismondi
dsr, kaz


<dsr> scribenick: dsr

Thing to Thing Research Group meeting

This is in respect to the next WoT F2F in Dusseldorf. The T2TRG meeting is in Prague.

Anyone know what pass is needed for the T2TRG meeting?

The one day pass for the IETF is $375, is that sufficient?

Michael_K: Ari and Karsten would know.

OCF Liaison meeting

Small meeting - we discussed our goals for the next WoT F2F. We would like to have some demos running.

Michael_K: I will work mostly on the upper layer stuff

Michael_M: The current open source software is in pretty good shape and includes device simulation. I am still trying to get it runnng and can share what I learned.


No presentations scheduled for today.

Summary of Osaka face to face

Kaz presents some of his photos of the face to face.

<kaz> photos and slides from the Osaka f2f

<kaz> minutes from Friday

<kaz> draft compiled minutes

We had some visitors to the plugfest and we showed them our demos.

Siemens had a problem with their temperature sensor but were able to use one of the other demos to source the room temperature as a thing.

We had around 50 people for the second day and a good set of talks for the Open Day, including an invited talk on behalf of Open Fog.

We got a group photo!

The rest of the days were focused on the IG/WG work items with break outs.

The agenda has links to slides and photos.

<kaz> Osaka f2f agenda

Security Summary

For security, we started with a talk in the open day and then had sessions on successive days.

We reviewed the threat model and references to external work.

We added roles and use cases to the threat model

One of the outcomes was a diagram showing the security boundaries for a WoT run-time and drivers etc.

Any questions?


Scripting API Summary

Johannes covers the scripting break out summary

We had two sessions, one on modelling of thing management. Nimura-san provided use cases and diagrams. Zoltan provided an architecture image.

In the second session we discussed the new version of the APIs and the similarities/differences to browsers.

The minutes were taken online.

<kaz> - Wed. 17: Main room, Breakout room

<kaz> - Thu. 18: Main room

<kaz> - Fri. 19: Main room


Michael_M: one question is about access to the device hardware?

Johannes: we agree that this should be through a thing.

Michael: this is good for security

Johannes: and to avoid fragmentation.

Serbastian summaries the discussions on thing descriptions

<kaz> TD Summary

We discussed the baseline thing description model with properties, actions and events.

We looked at using JSON-LD and also regular JSON

in respect to serialisation of interaction models

Michael: do the examples on the slide refer to the same interaction model?

<kaz> RFC6690

<kaz> [kajimoto-san's proposal on @include and @remove]

For the lifecycle of things, Kajimoto-san presented some ideas on introducing new terms for JSON-LD, e.g. @remove. He presented a demo and hopes to collaborate with the JSON-LD Community Group with a view to standardising the additions,

We looked at how to add semantic annotations to JSON schema.

This focused on use of @type declaration. There was a lot of discussion, e.g. does it make sense to use JSON Schema. We would like to look at other proposals from Dave and Yongjing.

See: https://github.com/w3c/wot/blob/master/proposals/dsr-td/td-draft-spec-dsr.md

Sebastian: please use the following issue for discussion

<sebastian> issue about semantic annotations in type definitions: https://github.com/json-schema-org/json-schema-spec/issues/309

We also discussed the thing description namespace, and how we would like to deal with versioning.

We discussed serialisation on Friday afternoon.

Daniel: we decided to take a fresh look at serialisation formats, and would like to consider a format that appeals to web developers, and another format that is better suited to high performance/constrained devices.

<kaz> scribenick: kaz

LD Summary

dsr: gives summary of LD discussion
... focused on the relationship between interaction model and semantic model
... encourage sdos to converge
... we have bridging ontology
... linking semantic models

dsr: expected plugfest during upcoming f2f
... ontologies for OCF, Echonent, OPC,e tc.
... to look at the opportunity for W3C to define APIs
... light-weight APIs to access ontologies
... the diagram on the right side explains the idea
... motion sensor, e.g., of OCF, provides data to other devices, e.g., oneM2M
... variations of cross-devices

Next f2f

Uday's slides on Dusseldorf meeting

uday: will work with Kaz for the wiki and registration site

mccool: suggestions for transport?

uday: try to look into it
... getting observer requests
... working smart stuff

mccool: use case discussions for OpenDay

uday: smart city or energy
... they work on mobility
... Matthias also mentioned some company
... note the dates will be 9-13 July
... Monday, 10 July would be OpenDay?

mccool: depends on who can come which day
... monday sounds like a plan at the moment

uday: would like to start invite observers then
... any other opinions from the group?

(no specific comments)

Next step - roadmap

matthias: slides online

<mkovatsc_> https://www.w3.org/WoT/IG/wiki/images/b/b4/2017_F2F-Osaka-Next.pdf

matthias: please see the above slides
... no time for today

mccool: would like to talk about marketing things as well

matthias: will be taking vacation next week

mccool: better to have some discussion this week?

matthias: this week would be better than next week

kaz: we should talk with the W3C Comm Team as well

mccool: would start some initial discussion as well

sebastian: I'll be on vacation next week too
... Taki will take the lead for Friday, May 26th
... btw, wondering about the write permission for the TD repo

kaz: let's have discussion on that point offline

mccool: btw, this Friday, neither Zoltan or Elena can make the Security call

kaz: let's cancel the call then

mccool: ok


Summary of Action Items

Summary of Resolutions

[End of minutes]

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$Date: 2017/05/24 17:03:40 $