[luatex] CIDSet in PDF/A documents

luigi scarso luigi.scarso at gmail.com
Tue Jun 23 06:07:13 CEST 2015

On Tue, Jun 23, 2015 at 3:25 AM, Reinhard Kotucha <reinhard.kotucha at gmx.de>

> 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 ?


Validate PDF files against the PDF/A-1b standard.

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