[Tex/LaTex] PDF/A with CMYK, how

hyperrefpdf-a

Using https://tex.stackexchange.com/a/99666 and https://tex.stackexchange.com/a/136653 I think I have been able to generate (using TeX Live 2014, pdfTeX 3.14159265-2.6-1.40.15) a PDF/A-1b compliant pdf as:

\documentclass{article}
\pdfminorversion 4
\immediate\pdfobj stream attr{/N 3} file{sRGBIEC1966-2.1.icm}
\pdfcatalog{%
/OutputIntents [ <<
/Type /OutputIntent
/S/GTS_PDFA1
/DestOutputProfile \the\pdflastobj\space 0 R
/OutputConditionIdentifier (sRGB IEC61966-2.1)
/Info(sRGB IEC61966-2.1)
>> ]
}
\usepackage{xcolor}
\usepackage{hyperxmp}
\usepackage[pdftex, pdfa]{hyperref}
\hypersetup{%
    pdfauthor          = {a},
    pdfkeywords        = {a, b, c},
    pdflang            = {en},
    pdftitle           = {a},
    pdfsubject         = {a},
  pdfcaptionwriter   = {a},
  pdfcontactaddress  = {a},
  pdfcontactcity     = {a},
  pdfcontactcountry  = {a},
  pdfcontactemail    = {a},
  pdfcopyright       = {a},
  pdfmetalang        = {en}
}
\usepackage{amsmath}
\usepackage{lipsum}
\begin{document}
\tableofcontents
\section {A}
{\color{blue}Hello} World!
\[1+2=3\]

\section {B}
\lipsum
\(1+2=3\)
\begin{align*}
A &= B\\
  &= C\\
  &= E
\end{align*}

\newpage

\section {C}
\lipsum
\[1+2=3\]
\end{document}

At least, PDFBox Preflight (http://en.wikipedia.org/wiki/Apache_PDFBox) says

The file test.pdf is a valid PDF/A-1b file

And also 3-Heights PDF Validator Online Tool (http://www.pdf-tools.com/pdf/validate-pdfa-online.aspx) is happy.

Now, I would like to use CMYK-colors.
So I downloaded an icc profile from http://www.eci.org/en/downloads
and tried this modification:

\documentclass{article}
\pdfminorversion 4
\immediate\pdfobj stream attr{/N 4} file{ISOcoated_v2_eci.icc}
\pdfcatalog{%
/OutputIntents [ <<
/Type /OutputIntent
/S/GTS_PDFA1
/DestOutputProfile \the\pdflastobj\space 0 R
/OutputConditionIdentifier (FOGRA39L)
/Info(FOGRA39L)
>> ]
}
\usepackage[cmyk]{xcolor}
\usepackage{hyperxmp}
\usepackage[pdftex, pdfa]{hyperref}
\hypersetup{%
    pdfauthor          = {a},
    pdfkeywords        = {a, b, c},
    pdflang            = {en},
    pdftitle           = {a},
    pdfsubject         = {a},
  pdfcaptionwriter   = {a},
  pdfcontactaddress  = {a},
  pdfcontactcity     = {a},
  pdfcontactcountry  = {a},
  pdfcontactemail    = {a},
  pdfcopyright       = {a},
  pdfmetalang        = {en}
}
\usepackage{amsmath}
\usepackage{lipsum}
\begin{document}
\tableofcontents
\section {A}
{\color{blue}Hello} World!
\[1+2=3\]

\section {B}
\lipsum
\(1+2=3\)
\begin{align*}
A &= B\\
  &= C\\
  &= E
\end{align*}

\newpage

\section {C}
\lipsum
\[1+2=3\]
\end{document}

Now, PDFBox Preflight complains:

5.2.3 : Forbidden field in an annotation definition, Annotation uses a Color pro
file which isn't the same than the profile contained by the OutputIntent

And 3-Heights PDF Validator Online Tool says:

A device-specific color space (Annotation C or IC) without an appropriate output intent is used.
The document does not conform to the requested standard.
The document contains device-specific color spaces.

However, If I remove the tableofcontents a valid (according to PDFBox Preflight) PDF/A-1b seems to be generated.

What is the problem, and how do I fix it?

UPDATE:

The problem appears to be with hyperref. See the comments.
Is it possible to redefine some part of hyperref to avoid the problems?

I would like something like this to work:

\documentclass{article}
\pdfminorversion 4
\pdfcompresslevel=0
\immediate\pdfobj stream attr{/N 4} file{ISOcoated_v2_eci.icc}
\pdfcatalog{%
/OutputIntents [ <<
/Type /OutputIntent
/S/GTS_PDFA1
/DestOutputProfile \the\pdflastobj\space 0 R
/OutputConditionIdentifier (FOGRA39L)
/Info(FOGRA39L)
>> ]
}
\usepackage[cmyk]{xcolor}
\usepackage{hyperxmp}
\usepackage[pdftex, pdfa]{hyperref}
\hypersetup{%
  colorlinks = true,
    pdfauthor          = {a},
    pdfkeywords        = {a, b, c},
    pdflang            = {en},
    pdftitle           = {a},
    pdfsubject         = {a},
  pdfcaptionwriter   = {a},
  pdfcontactaddress  = {a},
  pdfcontactcity     = {a},
  pdfcontactcountry  = {a},
  pdfcontactemail    = {a},
  pdfcopyright       = {a},
  pdfmetalang        = {en},
}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amsrefs}
\usepackage{lipsum}
\theoremstyle{plain}
\newtheorem{theorem}{Theorem}
\begin{document}
\tableofcontents
\section {A}
{\color{blue}Hello} World!
\begin{theorem}
\label{thm.1}
\begin{equation}
1=1\label{eq.1}
\end{equation}
\end{theorem}
\begin{proof}
By reflexivity of \(=\).
\end{proof}
Theorem \ref{thm.1} is about the equation \eqref{eq.1}.
See also \cite{MR1727844}.
\begin{bibdiv}
\begin{biblist}
\bib{MR1727844}{book}{
   author={Bourbaki, Nicolas},
   title={Algebra I. Chapters 1--3},
   series={Elements of Mathematics (Berlin)},
   note={Translated from the French;
   Reprint of the 1989 English translation [ MR0979982 (90d:00002)]},
   publisher={Springer-Verlag, Berlin},
   date={1998},
   pages={xxiv+709},
}
\end{biblist}
\end{bibdiv}
\end{document}

Best Answer

Is it possible to redefine some part of hyperref to avoid the problems?

Short answer: yes.

A few years later there is now a cleaner way to produce CMYK PDF/A. One advantage of CMYK is that it's possible to produce documents which validate PDF/A and PDF/X at the same time.

Since links are forbidden in PDF/X up to 5 this means you must disable them. Or you leave them active and «risk» a validation error. This has been accepted as a problem in the standard so the draft for PDF/X-6 allows hyperlinks officially.

minimal example

%\pdfobjcompresslevel=0 %uncomment for Texlive
\documentclass{article}
\usepackage{lipsum}
\usepackage[pdfa,bookmarks=false]{hyperref} %bookmarks are incompatible with PDF/X<6
\usepackage[latin]{babel}
\usepackage{hyperxmp}[2020/06/15]
\usepackage{mmap} %only needed for pdfTeX, does not harm LuaTeX
\usepackage[cmyk,hyperref]{xcolor}

% Which paper did the authors have in mind when they created the document?
\immediate\pdfobj stream attr{/N 4} file{PSO_Uncoated_ISO12647_eci.icc}
\pdfcatalog{%
  /OutputIntents [ <<
    /Type /OutputIntent
    /S /GTS_PDFX
    /DestOutputProfile \the\pdflastobj\space 0 R
    /Info(PSO Uncoated ISO12647 (ECI))
    /OutputCondition(Offset printing, according to ISO 12647-2:2004/Amd1, OFCOM, paper type 4 = uncoated white, 115 g/m2, tone value increase curves C (CMY) and D (K))
    /OutputConditionIdentifier (Uncoated FOGRA47)
    /RegistryName(http://www.color.org)
  >>
  <<
    /Type /OutputIntent
    /S /GTS_PDFA1
    /DestOutputProfile \the\pdflastobj\space 0 R
    /Info(PSO Uncoated ISO12647 (ECI))
    /OutputCondition(Offset printing, according to ISO 12647-2:2004/Amd1, OFCOM, paper type 4 = uncoated white, 115 g/m2, tone value increase curves C (CMY) and D (K))
    /OutputConditionIdentifier (Uncoated FOGRA47)
    /RegistryName(http://www.color.org)
  >> ]
}

\makeatletter
% Bugfix of hyperref to produce CMYK links
\let\HyColor@HyperrefBorderColor\HyColor@XZeroOneThreeFour
\makeatother

\makeatletter
%we need to tell PDF/X the final format of the paper. This needs adjustment if you want graphics on the page border, called bleeding
\@tempdima=0.99626400996264009962\paperwidth
\edef\boxwd{\strip@pt\@tempdima}
\@tempdima=0.99626400996264009962\paperheight
\edef\boxht{\strip@pt\@tempdima}
\makeatother
\edef\next{%
  \protect\pdfpageattr{
    /TrimBox[0.0 0.0 \boxwd\space \boxht]
  }%
}
\next

\title{PDF/A-2b dummy document}
\author{anonymus}

\hypersetup{%
    pdfdisplaydoctitle=true,
    pdfversionid=1,
    pdftrapped=False,
    pdfapart=2,
    pdfaconformance=B,
    pdfstartpage={},
    pdfxstandard={PDF/X-4},
    urlbordercolor=red
}

\begin{document}
%\begin{NoHyper} %comment out to avoid links

\tableofcontents

\section {A}
\lipsum[1-2]
\url{http://tex.stackexchange.com/}

%\end{NoHyper} % comment out to avoid links
\end{document}

This example uses the rather new version of hyperxmp. It validates in Acrobat DC, VeraPDF and 3-Heights when compiled either in pdfLaTeX or LuaLaTeX. The hyperref workaround is from it's issue tracker.

I used FOGRA47 as the colour profile because it is small and thus safe. You don't easily risk colours which cannot be printed or displayed on screen. The profile is available from European Color Initiative.

Related Solutions

[Tex/LaTex] hyperref, natbib and PDF/A-compliance

I'm not sure if an answer is still of interest. Anyway:

1) I would strongly advise to use the pdfx package:

\usepackage[a-1b]{pdfx}

2) The error in the pdfx package is caused by the way how the timestamp is put together. Depending on your timezone (e.g. UTC+1, UTC-1, etc) you have a different sign there. This causes the issue.

Use of \getTZh doesn't match its definition.

You therefore need to put the pdfx.sty in your working directory and need to adjust that specific line accordingly:

\def\getTZh +#1#2{\edef\xTZh{#1#2}\getTZm} % change - to + if error occurs (due to timezone)

...

T\xHour:\xMin:\xSec+\xTZh:\xTZm}} % change - to + if error occurs (due to timezone)

Alternatively, you may change the timezone of your system.

3) pdfx automatically loads the hyperref package, too. If you want to have a customized hyperref setup, you can use:

\hypersetup{
   unicode,
   colorlinks=true
}

In addition to that, you need to provide a color profile and a valid xmp file. Information on this can be found in the pdfx manual. This solution relies on pdftex.

I'm not aware of any solution using dvips.

[Tex/LaTex] PDF/A with hyperref on TeX Live 2013

Put the color profile eciRGB_v2.icc in the working directory.
Add the flowing code to your preamble:

    \usepackage{hyperxmp}
    \usepackage[pdfa, linktoc=none]{hyperref}

    % ===============================
    % Embedding the color profile.
    % Requires eciRGB_v2.icc in the working directory
    % http://www.eci.org/_media/downloads/icc_profiles_from_eci/ecirgbv20.zip
    \immediate\pdfobj stream attr{/N 3}  file{eciRGB_v2.icc}
    \pdfcatalog{%
        /OutputIntents [ <<
            /Type /OutputIntent
            /S/GTS_PDFA1
            /DestOutputProfile \the\pdflastobj\space 0 R
            /OutputConditionIdentifier (eciRGB v2)
            /Info(eciRGB v2)
        >> ]
    }

Add metadata with hyperxmp and \hypersetup:

\title{Title}
\author{First Author, Last Author}
\hypersetup{%
             pdfauthortitle={Title of the Author},
             pdfcopyright={Copyright (C) 20xx, Copyrightholder},
             pdfsubject={Something},
             pdfkeywords={Keyword1, Keyword2},
             pdflicenseurl={http://creativecommons.org/licenses/by-nc-nd/3.0/},
             pdfcaptionwriter={Scott Pakin},
             pdfcontactaddress={Street},
             pdfcontactcity={City},
             pdfcontactpostcode={101},
             pdfcontactcountry={Country},
             pdfcontactemail={email@institute.edu},
             pdfcontacturl={http://www.institute.edu},
             pdflang={en},
             bookmarksopen=true,
             bookmarksopenlevel=3,
             hypertexnames=false,
             linktocpage=true,
             plainpages=false,
             breaklinks
         }

Everything put together results in a document like this:

    % ===============================
    % Filename: test.tex

    \documentclass{article}
    \usepackage{hyperxmp}
    \usepackage[pdfa, linktoc=none]{hyperref}

    % ===============================
    % Embedding the color profile.
    % Requires eciRGB_v2.icc in the working directory
    % http://www.eci.org/_media/downloads/icc_profiles_from_eci/ecirgbv20.zip
    \immediate\pdfobj stream attr{/N 3}  file{eciRGB_v2.icc}
    \pdfcatalog{%
        /OutputIntents [ <<
            /Type /OutputIntent
            /S/GTS_PDFA1
            /DestOutputProfile \the\pdflastobj\space 0 R
            /OutputConditionIdentifier (eciRGB v2)
            /Info(eciRGB v2)
        >> ]
    }

    % ----------------------------------------------
    % Add metadata
    \title{Title}
    \author{First Author, Last Author}
    \hypersetup{%
                 pdfauthortitle={Title of the Author},
                 pdfcopyright={Copyright (C) 20xx, Copyrightholder},
                 pdfsubject={Something},
                 pdfkeywords={Keyword1, Keyword2},
                 pdflicenseurl={http://creativecommons.org/licenses/by-nc-nd/3.0/},
                 pdfcaptionwriter={Scott Pakin},
                 pdfcontactaddress={Street},
                 pdfcontactcity={City},
                 pdfcontactpostcode={101},
                 pdfcontactcountry={Country},
                 pdfcontactemail={email@institute.edu},
                 pdfcontacturl={http://www.institute.edu},
                 pdflang={en},
                 bookmarksopen=true,
                 bookmarksopenlevel=3,
                 hypertexnames=false,
                 linktocpage=true,
                 plainpages=false,
                 breaklinks
             }

    \begin{document}
    What cat says? \label{meow}
    See question on page \pageref{meow}.
    \end{document}

Which is PDF/A-1b compliant:

Result of online pdf-validation tool

Update: Since the original answer, things have changed several times. For a while luatex85 had to be loaded but today it would break compilation. But it's also not needed anymore. The packages have to be loaded before setting the OutputIntent today.

This works only with pdfLaTeX, LuaHBTeX and LuaLaTeX.

Best Answer

minimal example

Related Solutions

[Tex/LaTex] hyperref, natbib and PDF/A-compliance

[Tex/LaTex] PDF/A with hyperref on TeX Live 2013

Related Question