Note that I have not done this, but I would suggest that before you go to all that trouble, try the Preflight feature of Acrobat Pro and do a conversion to PDF/X-A.
Been there, done that, thank you . The issue I am pondering is if it is of any importance tagging the elements before in InDesign and which of the three likely ways is better, if any.
I am diving into the creation of accesible PDF (508 section compliant) and afterwards passing that into PDF/A-2a standard. I manage to do that, but what I want to is to be sure I do not skip any needed step or that I don't add extra unneeded work.
InDesign does not currently support direct creation of PDF/A files, although it does support direct export of PDF/X. You can take a PDF/X-4 file directly-exported from InDesign and also enable it to pass as a PDF/A-2b file. However, any special tagging that you do within InDesign would not be passed on the resultant PDF/X / PDF/A file!
You might want to suggest support for direct PDF/A export support as a feature request to the InDesign development organization.
"... any special tagging that you do within InDesign would not be passed on the resultant PDF/X / PDF/A file!"
That's quite a surprise. Thanks a lot for the information. It cuts my Gordian knot right to the point.
Thanks a lot for the info and advice, Dov