My understanding is PDF/A requires a bit more metadata, for example some color profile information (ICC) and a description about where the data came from (XMP). Tesseract doesn't supply that, sorry. I have no reason to believe implementation is hard, it's just not something I'm currently working on. Would be happy to accept a patch. The PDF creation code in Tesseract is under 1000 lines long and not scary.
https://github.com/tesseract-ocr/tesseract/blob/master/api/pdfrenderer.cpp -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/33832728-ba8c-4e9b-939a-bb756af36cbb%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

