Beamer cannot produce a genuinely tagged PDF. The master template
validates as PDF/UA-2 only because tagpdf marks everything it was not
told about as decorative, so a screen reader gets the frame titles and
nothing else. Beamer 3.77 then made matters worse by refusing
\DocumentMetadata outright, which breaks tagging on TeX Live 2025 and
leaves the deck failing validation altogether.
ltx-talk was written by the LaTeX Project with tagging as a design goal.
The slides built here carry real paragraphs, lists as L/LI/Lbl/LBody,
sections as headings, formulas as MathML, and alt text that reaches the
PDF. veraPDF passes on the strength of that structure rather than in
spite of its absence.
The metropolis theme files go with beamer; trantor replaces them. Fonts,
figures and the purple palette are unchanged.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Switch to LuaLaTeX (better tagged PDF support), add \DocumentMetadata
for PDF 2.0 and language metadata, enable tagpdf tagging, and mark
tikz overlay commands (\credit, \marktopleft, \markbottomright) as
PDF artifacts.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add README with dependencies, clone instructions, script usage, and
patch submission guidance. Remove stale rubber invocation from the
clean target in the Makefile.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- moved from pdflatex to xelatex
- changed all the .sty files to those build from th latest version of
mtheme
- reworked the default template in a series of ways
- removed a bunch of cruft
- changed the logo to the new centered logo
- moved over to the new notes format (requires the new version of pdfpc)
- pre-process the logo.pdf instead of doing it in the makefile
- addes new support for putting the slide revision (from git) on the
first slide
