On Wed, Jul 2, 2014 at 10:54 PM, Otared Kavian <otared@gmail.com> wrote:

Hi Luigi,

I did a test with mkiv (see the tex file attached), and then tested the resulting pdf file on the site you mentioned,

        http://www.pdf-tools.com/pdf/validate-pdfa-online.aspx

Unfortunately it says that the PDF produced by mkiv is not conform:

test-PDF-A-1b.pdf does not conform to PDF/A.

Validating file "test-PDF-A-1b.pdf" for conformance level pdfa-1a
Invalid content of XMP packet header attribute 'id': 'dtlnfbrryjnvabnrajbkrpyw'.
dc:description :: Wrong value type. Expected type 'lang alt'.
The XMP property 'pdfaid:conformance' has the invalid value 'B'. Required is 'A'.
The key MarkInfo is required but missing.
A device-specific color space (DeviceGray) without an appropriate output intent is used.
The document does not conform to the requested standard.
The document contains device-specific color spaces.
The document's meta data is either missing or inconsistent or corrupt.
The document doesn't provide appropriate logical structure information.
Done.

So, I don’t know how to solve the issue of creating a PDF/A.

Thanks for any hint.
Best regards: OK

This pass acrobat xi preflight for pdf/a-1b

Note that the icc files 

default_cmyk.icc

default_gray.icc

default_rgb.icc

ISOcoated_v2_300_eci.icc

must be in

tex/texmf-context/colors/icc/profiles

and must match with the colorprofiles.xml in

tex/texmf-context/colors/icc/context

\setupinteraction

  [title=TITLE,

   subtitle=SUBTITLE,

   author=AUTHOR,

   keyword={{KEYWORD1, KEYWORD2}, KEYWORD3}]

%% For PDF/A

\setupbackend[

format={pdf/a-1b:2005},

profile={default_cmyk.icc,default_rgb.icc,default_gray.icc},

intent=ISO coated v2 300\letterpercent\space (ECI)]

\starttext

\chapter[chap:testing]{Testing}

\input knuth

\input tufte

\input knuth

\input tufte

\input knuth

\input tufte

\stoptext

This pass pdf/a-1a 

\setupinteraction

  [title=TITLE,

   subtitle=SUBTITLE,

   author=AUTHOR,

   keyword={{KEYWORD1, KEYWORD2}, KEYWORD3}]

%% For PDF/A

\setupbackend[

format={pdf/a-1a:2005},

profile={default_cmyk.icc,default_rgb.icc,default_gray.icc},

intent=ISO coated v2 300\letterpercent\space (ECI)]

%% Tagged PDF

%% method=auto ==> default tags by Adobe

%% \setupbackend[export=yes] it's necessary now to activate the tags

%% probably it could be optional

\setupbackend[export=yes]

\setupstructure[state=start,method=auto]

\starttext

\startchapter[title=Testing chapter]

\input knuth

\startsection[title=Testing section]

\bTABLE

\bTR\bTD 1 \eTD \bTD 2 \eTD \eTR

\bTR \bTD[nx=2] 3 \eTD\eTR

\eTABLE

\stopsection

\stopchapter

\stoptext

--
luigi