Given a PDF of random origin, how do I, on Linux:confirm whether it is in PDF/A format already?if it is not in PDF/A format, convert it to PDF/A with a minimum loss of fidelity?I am aware that the conversion may cause loss of exotic elements of the document, but let's assume that the ability to open the document at all in a relatively far future is more important than such spiffy features (which might not be available/readable at such a time anyway). I would rather be able to visually confirm the accuracy of the conversion when I can trivially view the documents side by side than risk not being able to open the original file.
Converting PDF to PDF/A?
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