On Tue, Jun 23, 2015 at 3:25 AM, Reinhard Kotucha <[email protected]> wrote:
> Hi, > at > > http://tracker.luatex.org/view.php?id=434 > > Hans wrote > > > pdf/a demands a cidset but we will forget about this till we find a > > proper example > > > > there is still some reported problem with some stream objects not > > properly being formatted cf. pdf/a but it is not clear what is > > going on there > > This message is now five years old. Any new perceptions? > > I'm using a TrueType font (CharisSIL) and one of five PDF/A validators > complains about a bad CIDSet. > > I created a small PDF file which only contains the string "abc", > extracted the TTF from the PDF file, and disassembled it with TTX. > Then I assembled the CIDSet manually according to the instructions > given in the PDF/A-1 specification (ISO 19005-1). I've got the same > result as LuaTeX, hence it's unclear to me what's going wrong. > > The PDFtron > > https://www.pdftron.com/ > > validator sais > > <Error Code="e_PDFA356" Message="CIDSet in subset font is incomplete" > Refs="95, 101"/> > > I tend to believe that the validator is wrong. On the other hand > PDFtron offers software which creates PDF/A files and I can't imagine > that their validator complains about their own products. > > Did anybody investigate? The nasty thing is that PDF/A is for long > term preservation and any file we create today has to comply with the > standard unconditionally. And for us TeX users, the fact that there > are zillions of invalid PDF/A files around just because old versions > of the Acrobat preflight tool ignored most errors, is not an excuse. > We should do better. > > >From the results of my own investigations I deduce that LuaTeX > provides a standard compliant CIDSet. Maybe different people > interpret the standard in a different way. But it would be nice to > know whether somebody else investigated this issue already. > > Regards, > Reinhard > > which pdf/a ? https://pdfbox.apache.org/ says """ Preflight Validate PDF files against the PDF/A-1b standard. """ -- luigi
