A maligned format now freely readable.
"If this message is not eventually replaced by the proper contents of the document, your PDF viewer may not be able to display this type of document." This error message appears when trying to read a PDF containing, amongst others, XFA forms. XFA forms are a deprecated feature that is supported only by Adobe Reader. Adobe Reader is not available on GNU/Linux.
- https://www.iso.org/standard/63534.html ("XFA forms have been deprecated from ISO 32000-2 in accordance with the outcome of the letter ballot following the Pretoria meetings.")
- https://www.linux.com/news/3-alternatives-adobe-pdf-reader-linux ("This will soon become a major issue as more and more government agencies make the switch to the Linux platform as their default desktop. To that end, one of the various PDF viewer/editor projects needs to come up with an immediate solution ─ otherwise those entities might wind up having to migrate back to the competition … just for the simple act of filling out paperwork.")