The LaTeX Project Team submitted an update to the

l3kernel

bundle.

Version: 2026-03-20 License: lppl1.3c

Summary description: LaTeX3 programming conventions

Announcement text: ----------------------------------------------------------------------

## [2026-03-20]

### Added

- `en`-type variants of `\text_...case:nn`

### Changed

- Adjust internal expansion in case functions to support `biblatex` (transitional measure)

## [2026-03-16]

### Added

- `\box_(g)frame:Nnn` and `\box_(g)underline:Nnn` - `\vbox:w`, `\vbox_top:w`, `\vbox_center:w` and their `:nw` and `_to_ht:nw` versions - Debugging switch `check-assertions`, `\debug_assert:nN(n)`, and `\debug_assert:nn(n)` (issue #1840)

### Changed

- Apply `\text_declare_purify_equivalent:Nn` to commands immediately following `\protect` - Adjust `\vbox_center:nn` to give identical dimensions to `\vcenter`

## [2026-02-18]

### Added

- `\coffin_pole:Nn` - `\dim_horizontal:(n|N|c)` and `\dim_vertical:(n|N|c)` - `\keyval_map_inline:nnn`, `\keyval_map_break:`, and `\keyval_map_break:n` - `\msg_expandable_error:nneee` and related `e`-type variants - `\vbox_center:n`, `\vbox_center:nn`, `\vbox:nn` and `\vbox_top:nn` - `\vbox_top_to_ht:nn` and `\vbox_center_to_ht:nn` - `\opacity_begin:n`/`\opacity_end:` and fill/stroke versions - Efficient `v`-type variants for `\dim_compare:nNn(TF)` and `\int_compare:nNn(TF)` - `\text_bcp_parse:n`

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The package’s Catalogue entry can be viewed at https://ctan.org/pkg/l3kernel

The package’s files themselves can be inspected at https://mirrors.ctan.org/macros/latex/required/l3kernel/

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Thanks for the upload.

For the CTAN Team Petra Rübe-Pugliese

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