PDF/UA-2 (ISO 14289-2): a tagged document on PDF 2.0 whose structure tree has a single Document element of the PDF 2.0
structure namespace as its root, covers every piece of real content (the rest is marked as artifacts) with standard or
role-mapped structure types nested as ISO/TS 32005 allows, uses neither H nor Note, gives lists with labels a
ListNumbering, has a title shown in the window, a determinable natural language, alternate text on figures, header cells
connected to their data cells, links and markup annotations tagged, every font embedded and mapped to Unicode, and the
pdfuaid identification (part 2, rev 2024) in the XMP metadata. Flow layout produces it with
FlowStructureNamespace.Pdf20, its default; it combines with PDF/A-4.
PdfUA2 = 2
ISO 14289-2:2024, clauses 5 to 8 (veraPDF PDF/UA-2 validation profile, with the ISO/TS 32005 containment rules).