ROOT Team Meeting

Monday Aug 11, 2025, 4:00 PM → 5:30 PM Europe/Zurich

32/1-A24 (CERN)

Danilo Piparo (CERN), Jakob Blomer (CERN)

PoW Status

Status Report Document

Vision for ROOT7

News

see Status Report document

• Think about PoW items after the summer break
  • Limited time left until the end of the year with ACAT and workshop

Shift Handover

Olivier -> Danilo

Forum handled, two failures on Windows, stressGraphics addressed by Serguey

Meeting Summaries

• I/O
  • Discussion with CMS XPOG on RNTuple + NanoAOD
  • Ideas about late model extension of record subfields (for HLT fields)
  • Have to see if we include XPOG in regular meetings with CMS Core Software
• Statistical Analysis Software
  • Discussion about features upstreamed from CMS Combine, feedback from ATLAS
  • Support for switching between PDFs (like a categorical free parameter)
• PPP
  • Discussion about RNTuple Attributes
  • Slides and detailed minutes: https://indico.cern.ch/event/1575919/
• Planning
  • Danilo will send email next week
  • JonasH: may want to ask about plans for releases next year, influences time commitment for bug fixes and backporting on the PoW
  • Danilo: discussion with Philippe about supported releases (triggered by ePIC)

Round Table

see Status Report document

• Philippe:
  • Working with CMS to (optionally) disable auto-parsing from TClass::GetClass
  • Can be used for "mini-campaigns" to find missing dictionaries and reduce memory usage
• Serguey:
  • Continued on CMake for roottest
  • Reminder about rebasing and checking CI before merging

4:00 PM → 4:01 PM Find notetaker

4:01 PM → 4:05 PM News

4:05 PM → 4:10 PM Shift Handover

Bertrand --> Danilo

4:10 PM → 4:15 PM Meeting Summaries and Plans

ROOT Meetings:
- I/O
- Statistical Analysis Software
- PPP
- Planning / Stakeholders

Related meetings:
- ML4EP
- LIM

4:15 PM → 4:45 PM Topics

• Liaisons' Reports

4:45 PM → 5:00 PM Round table

5:00 PM → 5:05 PM A.O.B.