TCG Meeting (online) - Thursday February 26 2026 @ 21:00 UTC

Attendees

• Attendees : Adrian, André, Baptiste, Brigitta, Francesca, Joshua, Judy, Marco, Pierre, Renaud, Sara, Sebastien, Stephane, Steve, Tess, Tom
• Regrets : Gilles, Grégory, Gus, Jesus, Mark CD, Mathieu, Tamara

Actions

• DONE - MM to create document for collecting DM use cases that could be used in hack-a-thon. Some initial ideas given during the 20260128 TCG meeting.
• OPEN - put together a template for call for proposals; model after DAL (re-open?)
  • So far, the event web page says to contact tcg or wg chairs if you propose a contribution. The closed mailing lists make this a little challenge, but Marco and Tom will monitor the TCG list for relevant e-mail attempts.
• OPEN - (ALL) brainstorm within groups about contributing to the data model usage hack-a-thon/workshop proposal (use this etherpad) (ONGOING)
  • about another month to go before trying a wrap-up
• OPEN - standards to be moved to the obsolete section: CDP
• NEW - (MM) contact AN regarding:
  • Adding registration option to express interest in Newcomers' Session.
  • Should we add infomation about in-person versus remote attendance to the participant list display?
  • Should the participant list be available publicly (not just to authenticated users who are already registered)?
• NEW (MM (and TD)) Add official TCG review for VOEvent and forward to Exec.
• NEW (MM (and TD)) Comfirm with DMWG and LM that MANGO doc is in final state, then add official TCG review for VOEvent and forward to Exec.
• NEW (MM (and TD)) Check with JS for vote on DocRegExt. Then maybe confirm with MD that all is ready, then add TCG review and forward to Exec.

Agenda

• (standing item): documents on track
  • RFC
    • VOEvent-2.1 - RFC page - what's the status?
      • BC: Applied proposed updates, including after JF updated his parser. That can be considered reference implementation. With Markus' suggestions on registration, I think we are good. RFC page has been updated with the parser reference.
      • MM: With no objections, MM and TD can add TCG official review and forward to exec.
    • MANGO-1.0 RFC page: check RFC progress & voting potential
      • MM: Comments seem to be addressed. Votes from WGs are there. Propose we confirm with DM WG and LM that the document is in its final state, then send to exec.
    • DALI-1.2 RFC page: RFC nearly empty
    • DocRegExt -1.0 RFC page: RFC
      • Has coments from all WGs and already some votes.
      • Comments answered, so waiting for DSP official vote
      • DSP comments indicate approval, so we will crosscheck with JS for vote, and MM and TD send to exec.
  • EN
    • DataOrigin-1.2: PEN ( PEN doc): status?
      • Defer discussion on this, but please use github and/or tcg mail list with comments.
  • Errata
    • any?
  • VEPs
    • any?

• IVOA June 2026 Interoperbaility Meeting
  • (communication?): newcomers session on Sunday 7
  • LOC asked for indications on session time
  • Wednesday afternoon 1st session might be unavailable or clashing an Exec closed doors meeting
  • CSP (met recently) is proposing: (plenary) on science platforms, (plenary) on AI on archives/repositories, (joint DM/DAL?) on spectroscopy
  • do WG/IGs have already ideas?

• • Time to work on program. A blank program page exists and is linked from event web page ( https://wiki.ivoa.net/twiki/bin/view/IVOA/InterOpJune2026)
    • A newcomers session has been proposed for Sunday afternoon (in 2 parts, ~2:30-6:30 with a break in the middle). A small room is available so attendance would be limited to about 20 people.
      • SG: Should we add question about newcomer attendance?
      • MM: Will check with AN on that.
      • HH, DM and AN will present the session
    • Briefly walked through draft program placeholders.
      • Includes plenaries for opening with maybe local presentation, science platforms, AI for data providers.
    • Exec meeting will be end of Wednesday schedule.
    • Perhaps organize and Education Group session as well as possible theory session.
    • Please start thinking about your sessions.
      • Combination of external contributions, internal activities of your group, new ideas/proposals.
      • Don't be concerned about filling up 90 minutes since discussion is always welcome and sometimes cutoff due to limited time.
    • Please register.
      • It was noticed that you cannot see the participant list unless you are registered and logged in. You may not have to log in to register, so we can consider displaying the participant list publicly.
      • Can create Indico account. Use that (not LDAP) to log in.

• IGs & TCG/CSP interfacing: start discussion on TCG-facing aspects
  • refer to summary etherpad
  • More communication without adding too much meeting time. Two main points:
    • By default, there are a lot of chairs at each TCG meeting which sometimes limits participation in discussions.
    • For some scientific topics, meeting with CSP may be more effective.
    • Please think about this and share your ideas.
    • Also brings up the point that some interest groups are more direclty scientific than others.
    • PF: Roles of IGs are not necessarily clear. For example, even the chairs are not necesarily clear on whether they need to vote or comment on RFCs.
    • FC: Perhaps IGs could choose whether to join the CSP. Also, it doesn't need to be the chair or vide chair. Could just be participants with science interests.
    • MM: Maybe that is more about composition of CSP than TCG organization.
    • MM: For those that work and participate in Ops IG, how do they see their role?
    • SG: Will put some thoughts into the Etherpad. Ops does include user experience and needs, so there definitely is science impact in some Ops issues and working with CSP more could be effective.
    • MM: Agree in general, though things like the weather report maybe less so.
    • BC: Are IGs involved with the CSP?
    • MM: No, there is no formal relationship, and this discussion proposes more of a formal relationship. Maybe this is the uncontroversial part of this (that IGs should participate in CSP with less need to participate in TCG meetings).
    • BC: On a related note, it would be nice to establish more formal ties (maybe via CSP) to helio organization.
    • MK: Radio may be a mix of science and technical. It started with technical problem of how data providers can use IVOA protocols for their data
    • BC: That is really the case with SSIG and HEIG as well.

• how to handle priorities and activities besides documents on track and roadmaps

• other topics
  • positions still TBF: Radio IG vice-chair role is open
  • Edu IG vice-chair: open but something is moving
  • new website: report
    • Might do the switch this weekend (not guaranteed). You will be alerted when that happens.

• AOB

• Date for the next TCG
  • proposal: Tue. 31st March (or Wed. 8th April) - at 13:00 UTC

TCG meeting dates, as well as other relevant meetings, should always be reported also at the IVOA Events page.