19.1 LaTeX

Set the pdfstandard variable to produce tagged PDFs conforming to PDF/A, PDF/X, or PDF/UA standards. For example:

pandoc -V pdfstandard=ua-2 --pdf-engine=lualatex doc.md -o doc.pdf

Multiple standards can be combined:

---
pdfstandard:
  - ua-2
  - a-4f
---

The required PDF version is inferred automatically. This feature requires LuaLaTeX in TeX Live 2025 with LaTeX kernel 2025-06-01 or newer.