Hello, I would like to use pdf/A-2a for my documents and was wondering whether the documents will stand up to validation. I used veraPDF for the validation check. Unfortunately the a-variants (pdf/A1-a and pdf/A-2a) fail. Here the Validation Information: Validation information *Rule* *Status* Specification: ISO 19005-2:2011, Clause: 6.7.3.3, Test number: 1 https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-and... The logical structure of the conforming file shall be described by a structure hierarchy rooted in the StructTreeRoot entry of the document's Catalog dictionary, as described in ISO 32000-1:2008, 14.7 **Failed** 1 occurrences Hide PDDocument StructTreeRoot_size == 1 root/document[0] StructTreeRoot entry is not present in the document catalog Specification: ISO 19005-2:2011, Clause: 6.7.2.2, Test number: 1 https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-and... The document catalog dictionary shall include a MarkInfo dictionary containing an entry, Marked, whose value shall be true **Failed** 1 occurrences Hide CosDocument Marked == true root MarkInfo dictionary is not present in the document catalog, or Marked entry is set to false or is not present in the MarkInfo dictionary (MarkInfo = null, Marked = null) See the (shortened) minimal example taken from the wiki below. Does anyone have any experience or advice on how to make pdf/A-2a valid? Greetings Thomas \setupinteraction [title=TITLE, subtitle=SUBTITLE, author=AUTHOR, keyword={{KEYWORD1, KEYWORD2}, KEYWORD3}] %% For PDF/A \setupbackend[ format={pdf/a-2a}, %%%%validation fails %format={pdf/a-2b}, %%%%validation passed %format={pdf/a-2u}, %%%%validation passed %format={pdf/a-1b:2005}, %%%%validation passed %format={pdf/a-1a:2005), %%%%validation fails profile={default_cmyk.icc,default_rgb.icc,default_gray.icc}, intent=ISO coated v2 300\letterpercent\space (ECI)] \starttext \chapter[chap:testing]{Testing} \input knuth \input tufte \stoptext