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Andy Wootton

@thomasfuchs I'm currently scanning monochrome photographic prints from the 1940s and trying to guess if JPEG, PNG or PDF will last longest :-/.

@woo @thomasfuchs just as a sort of general fyi, a pdf here would essentially just be a wrapper for another image format (likely jpeg), so if your concern is, say, jpeg decoders ceasing to exist, you still have to worry about that on top of the buckwild pdf format itself.

@woo @thomasfuchs the PDF/A profile is intended for archival use (I worked on a national archive system some 15 years back and that was what we aimed for). en.wikipedia.org/wiki/PDF/A .

en.wikipedia.orgPDF/A - Wikipedia

@bazzargh @thomasfuchs Thanks. I should have known that. I used to sit with the librarians in a technical library of an energy company that maintained 40 year old power stations. One of the librarians went to work at a university that was digitising their archives.