The original SVG source names DejaVu Sans with a generic sans-serif fallback. PDF rendering can embed DejaVu glyphs. The separate DejaVu copyright/licence text is copied as dejavu-font-copyright.txt; it is not re-licensed as a SubjectNest asset. The four PDF files are untagged print derivatives. Offer full text and tactile alternatives or adapt the SVG rather than promising PDF screen-reader accessibility.