PDF/A-3a is similar to PDF/A-2a but allows embedding of non-PDF/A files

PDF/A-3b is similar to PDF/A-2b but allows embedding of non-PDF/A files

PDF/A-3u is similar to PDF/A-2u but allows embedding of non-PDF/A files

PDF/AEX

PDF/E

PDF/E or PDF/X

PDF/E-1 requires that all page content and resources necessary for displaying or pri...

PDF/UA-1

PDF/X

PDF/X Conformance