2024-11-5 Meeting notes

Approve 2024/7/9 minutes.

@Scot Breitenfeld ​

Approved.

cgns.org

@Scot Breitenfeld ​

Thomas Hauser will add @Scot Breitenfeld as an alternative owner.

There are no updates; I’ve reached out to Thomas.

high-level editing tools for the documentation page

@Mickael PHILIT

@Scot Breitenfeld ​

Doyxgen was recently updated for usage with Breathe/Sphinx, Doxygen Updates by brtnfld · Pull Request #777 · CGNS/CGNS

New PR Doxygen->Breathe->Sphinx MLL docs by brtnfld · Pull Request #6 · CGNS/cgns.github.io A few minor tasks remain before archiving the old web pages.

We plan to finish and release 4.5.0 before the end of the year.

Converting CGNSTalk archive to Github Discussion Posts

@Scot Breitenfeld

No update.

Discussion of the need to extend the standard to include identifiers and references

@Scot Breitenfeld

With more widespread sharing of CGNS data, such as ML training, it might be helpful to standardize unique identifiers (global) for the file (maybe data, local?). Some examples:

• Online Resources: creator URL, publisher URL, contributors

• UUIDs, date convention, citations

• Descriptive keywords

• Lineage: audit trail for mods to original data

@Scot Breitenfeld Submitted a DOE pre-proposal to gauge interest in funding the work.

No feedback from DOE.

mixed element/face zones discussion

@David Garlisch

ParaView: Mixed definition of unstructured zone by elements and by faces is not valid · CGNS CGNS · Discussion #720

Unrelated, the files also cause Paraview to crash.

The Paraview issue will be investigated at the next CGNS meeting.

Multiple CGNS library version support.

@Vicky Moschou

A new workaround allows the API user to support the import/export of TWO different major versions of CGNS (let's say series 4 and series 3) without the need to build and maintain multiple CGNS library instances. Only the latest library instance is enough.

@Vicky Moschou will send @Scot Breitenfeld or @Mickael PHILIT proposed addition for a CGNS PR.

CPEX #0046 – CPEX 0046 - New particle extension proposal · Issue #772 · CGNS/CGNS

We will move to merge to develop and the 4.5.0 release ASAP.

The documentation will be included in the new web pages.

Status update on Accepted CPEX #0045

CGNS-182: CPEX 0045: Polynomial Data and Curved Grid ElementsIn Progress

No Discussion

No one is currently actively working on this. We will keep the project on the agenda for the meeting, but we don’t expect any updates.

Status update on Accepted CPEX #0047 Proposed Data integration Points

@Mickael PHILIT

Working on the new website before creating a new development branch to prevent duplicating efforts.

Started prototyping with Python and C and will push a branch on GitHub in the upcoming weeks. (The “C” branch is a slow work in progress)

• The first draft of the API is in the branch GitHub - CGNS/CGNS at wip_cpex-0047

  • No unit test of the API yet

  • Sample test representative of applications done and will be improved to remove the “.cgns” binary file.

  • Feedback on API is appreciated

  • Target CGNS 5.0

prioritization, review and attribution of JIRA bugs/issues

@Tony Garratt @David Gutzwiller ​

Next release 4.5.0, Kanban: v4.5.0 • CGNS

Current status for Ansys:

No urgent issues.

• @Scot Breitenfeld Is completing the option of using subfiling for CGNS.

  • Targeting the 4.6.0 release, currently in the subfiling branch.

​

Discuss adding a level below zones to avoid slowness issues due to creating many zones.

@Stephen Guzik

@Stephen Guzik will develop a CPEX for further discussion

• Might post the topic on cgnstalk to reach a wider audience.

Remove discussion as an alternative solution is being investigated.