NGFF PR Review (2026-07-02)

[jo-mueller]

Next NGFF PR review meeting.

Date & Time: Thursday 02/07 14h CEST

Meeting place: https://bit.ly/imagesc-island

Please prepare the PRs you would like reviewed before the meeting. As always, everyone is welcome to suggest topics or PRs for discussion.

Parent: #35

[jo-mueller]

ngff-spec

The simple(r) things:

• More and fixed cross refs ome/ngff-spec#169
• Streamline input output constraints ome/ngff-spec#137
• refactor: use camelCase in byDimension transform ome/ngff-spec#166
• schema: require version ome/ngff-spec#164
• spec: clearer wording around graph connectedness ome/ngff-spec#165
• spec: tighten rules for metadata on displacements ome/ngff-spec#158
• Update authors ome/ngff-spec#157
• spec: removed invalid mapAxis example ome/ngff-spec#129
• cleanup: remove arrayCoordinateSystems ome/ngff-spec#151
• spec: Hint on expectations on multiscale transforms ome/ngff-spec#146
• docs: add recommendation for coordinate system ome/ngff-spec#144
• Minor formatting fixes ome/ngff-spec#135
• fix: correct typo and add fcollman orcid ome/ngff-spec#133
• add rfc8 authors to RFC contrib section ome/ngff-spec#136

The bigger lifts:

• Displacements are multiscales ome/ngff-spec#145
• Add projectAxis transform ome/ngff-spec#130

[clbarnes]

• Promote Sequence transforms to MUST, ByDimension to SHOULD
  • sequences are simple and required for multiscales; bydimensions are reasonably simple and practically required for multi-channel images
• Remove strict schemas and test cases
  • reduces ongoing maintenance burden

[lubianat]

ngff

good to go afaik

• Update tools and datasets ome/ngff#529
• fix: fix broken links on the first page + bump bikeshed and Python version on RTD ome/ngff#534
• RFC 9 comment 6 (browser-based lazy reader implementation) ome/ngff#544
• docs: add version history to spec page build ome/ngff#517
• explain authorship rules ome/ngff#522

• https://github.com/ome/ngff/pulls?q=is%3Apr+is%3Aopen+label%3Adependencies

some more work

• doc: Add BIDS support for OME-Zarr ome/ngff#514 (mentioned in Update tools and datasets ome/ngff#529 as preliminary support)

[lubianat]

I'll add https://github.com/German-BioImaging/ome-zarr-acknowledgments/pulls just in case

[lubianat]

maybe discuss in theory ome/ngff#552 and 👍 for a full protototype there