pdfA
Requests best-effort PDF/A-2b conformance for the document. Equivalent to setting MetadataScope.pdfACompliance inside metadata { }, but survives across metadata { } calls (like encryption and attachment) and wins over the value set there.
Honest scope: best-effort only — XMP id + sRGB output intent + document-info alignment + MarkInfo /Marked. Full veraPDF conformance is not guaranteed. JVM/Desktop only; Android and iOS ignore it. See PdfMetadata.pdfACompliance.