[smart-cities] minutes - 7 July 2025

available at:
  https://www.w3.org/2025/07/07-smart-cities-minutes.html

also as text below.

Regarding the date for the next meeting, I'd organize another Doodle
poll to identify a good day given it's already the summer vacation
season.

Thanks,

Kazuyuki

---
   [1]W3C

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

                             – DRAFT –
              Web-based Digital Twins for Smart Cities IG

07 July 2025

   [2]Agenda. [3]IRC log.

      [2] https://github.com/w3c/smart-cities/blob/main/README.md#7-jul-2025
      [3] https://www.w3.org/2025/07/07-smart-cities-irc

Attendees

   Present
          Kaz_Ashimura, Kunihiko_Toumura, Mark_Fox,
          Michael_Koster, Tomoaki_Mizushima, Torbjorn_Lahrin

   Regrets
          -

   Chair
          Koster

   Scribe
          kaz

Contents

    1. [4]Guests
    2. [5]Minutes
    3. [6]PRs
         1. [7]PR 8
    4. [8]Discussion on the resources
    5. [9]Next meeting

Meeting minutes

  Guests

   Kaz: we have Mark today as well :)

  Minutes

   [10]May-26

     [10] https://www.w3.org/2025/05/26-smart-cities-minutes.html

   Koster: (goes through the minutes)
   … any changes?

   (none)

   approved

  PRs

    PR 8

   [11]PR 8 - Update technology-categories.md

     [11] https://github.com/w3c/smart-cities/pull/8

   Koster: (goes through the changes)

   Kaz: based on the discussion in May
   … have put two major categories
   … digital twin framework and vocabulary
   … then put the existing contents under those categories

   Koster: nothing controversial :)

   Kaz: right
   … let's merge this PR
   … and then continue our discussion on the existing resources

   Koster: ok
   … any objections?

   (none)

   merged

  Discussion on the resources

   Kaz: Mark mentioned in May that he was working with his
   students on survey around vocabularies
   … would see which part can be published and which part can be
   put here on the resources.md and categories.md

   Mark: so far, what I see is a set of categories is more smart
   city oriented
   … major services for smart cities are also worked by ISO/IEC
   … transportation, water and public safety, etc.
   … it depends on what you want
   … organizations, companies, etc.
   … vocabularies and ontologies of those contexts for various
   services
   … e.g., transportation ontology a few years ago
   … water sanitization as well
   … land zoning
   … building
   … section of services for smart cities in general

   Kaz: tx a lot for your thoughtful comments!

   Koster: like Brick and Real Estate Core
   … how should we proceed?

   Kaz: yeah
   … the resources.md is getting messy
   … so would suggest we add those major services and ontologies
   for smart cities to the technology-categories.md instead

   Koster: how to deal with the existing contents?

   Mark: entity/relationship data is OK to be under vocabularies
   … but would be better to have another category like sensor data
   for "Time series and measurements"
   … I can show some diagram about the structure

   Koster: tx!
   … good to clarify the basic layers also

   Mark: (shows the ontology stack diagram)
   … service level, city level and foundation level
   … foundation level has activity, agreement, agent, city units,
   change, general properties, location, mereology, organization
   structure, provenance, recurring event, resource and time
   … city level has building, bylaw, city, contact, contract,
   household, indicator, infrastructure, land use, person,
   organization, resident, sensors, service
   … service level has transport network, road network, rail
   network, micromobility networ, pedestrian network, travel
   corridor, public transport system, transport alert; public
   health vent, desease, person, medical resource, resource
   logistics, etc.

   Koster: are they already standardized?

   Mark: some of them are already standards
   … and some of them are getting standards
   … (then shows examples)

   [12]ISO/IEC 5087-2 Information technology - City data model —
   Part 2: City level concepts

     [12] http://ontology.eil.utoronto.ca/5087/2/index.html

   Koster: wondering who is using what

   Mark: good question

   Koster: looks a lot of work is done
   … there are RDF-Star and NGSI-LD also
   … should look into information model also
   … what to be done to create an interoperable framework for
   smart cities?
   … obviously shouldn't start with creating something from
   scratch

   Mark: it's difficult to answer
   … there is not a single place for everything
   … always motivated by people's interest
   … some work done for city and we could look into several papers
   … give me a sec...
   … (shows ISO/IEC 5087-2)
   … the Appendix has resources

   Kaz: thanks! really useful
   … but do we need to pay for this document?

   Mark: need to pay for this document itself
   … but don't need to pay for our implementation :)

   Kaz: it seems the ISO/IEC site is not publicly available...
   … can we refer to your GitHub repo instead?

   [13]Household Ontology on GitHub

     [13] https://enterpriseintegrationlab.github.io/icity/Household/doc/index-en.html

   Mark: yes, the primary resource is managed on the ISO/IEC site
   but you can refer to the GitHub also
   … that is our work area
   … the diagram I showed describes the basic architecture of the
   ontologies
   … but it depends on what you need

   Koster: yeah, makes sense
   … what to be implemented and information model to be clarified
   … actual service you need
   … starts getting more specific

   Mark: to me, the key adjective here is "Web-based"
   … also important to have the phrase "Digital Twins" in front of
   "Smart Cities"
   … wondering what "Web-based" here really means

   Kaz: we added "Web-based" mainly because we wanted to start
   with Web standards
   … what to be extended for Web standards is the key question
   here

   Koster: yeah, for example, Web of Things is a Web standard for
   digital twins
   … we're still scoping as an Interest Group

   Kaz: we're getting out of time, but thank you very much for
   your input, Mark! your advice is always really helpful.

   Mark: think you need to understand multi agents for the Web as
   well

   Koster: right

   Kaz: indeed
   … actually, that's why we're organizing yet another W3C
   workshop on smart agents :)

   Koster: let's wrap up the discussion
   … need to think about what "Web-based" means for Smart Cities
   and Digital Twins

  Next meeting

   Kaz: will organize another Doodle poll to accommodate Mark and
   Torbjorn

   Koster: ok
   … the meeting adjourned for today

   [adjourned]


    Minutes manually created (not a transcript), formatted by
    [14]scribe.perl version 244 (Thu Feb 27 01:23:09 2025 UTC).

     [14] https://w3c.github.io/scribe2/scribedoc.html

Received on Monday, 7 July 2025 14:38:32 UTC