I tried PDF/A a while back and noticed the XMP header has an extra byte order mark which validators flagged as “??”. I’ve attached the patch I used to remove it, however I’m still on an old version of ConTeXt so this might not apply cleanly to yours. You might need to open the patch in a hex editor to see the difference in the two lines as most text editors will not show the BOM. -- Leo On Fri, 2 Nov 2018 at 20:12, luigi scarso wrote:

Il giorno ven 2 nov 2018, 19:06 Rik Kabel ha scritto:

...

The example file in the wiki (at https://wiki.contextgarden.net/PDF/A) no longer verifies as compliant PDF/A. VeraPDF rejects it, and https://www.pdf-online.com/osa/validate.aspx complains:

x107.pdf Compliance pdfa-1b Result Document does not conform to PDF/A. Details

Validating file "x107.pdf" for conformance level pdfa-1b

Invalid content of XMP packet header attribute 'begin': '??'.

The property 'pdfx:ConTeXt.Support' is not defined in schema 'PDF/X ID Schema'.

The property 'pdfx:TeX.Support' is not defined in schema 'PDF/X ID Schema'.

The property 'pdfx:LuaTeX.Version' is not defined in schema 'PDF/X ID Schema'.

The property 'pdfx:LuaTeX.Functionality' is not defined in schema 'PDF/X ID Schema'.

The property 'pdfx:LuaTeX.LuaVersion' is not defined in schema 'PDF/X ID Schema'.

The property 'pdfx:LuaTeX.Platform' is not defined in schema 'PDF/X ID Schema'.

The document does not conform to the requested standard.

The document's meta data is either missing or inconsistent or corrupt.

The document does not conform to the PDF/A-1b standard.

Done.

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I will check it asap

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I’m afraid I don’t remember exactly which validator that was. I tried a few such as veraPDF and Adobe Acrobat’s preflight verifier. I found one of the preflight output files from Acrobat (but not the input document unfortunately) and these were the errors when validated against PDF/A-3a: 1. Device process color used but no PDF/A OutputIntent (101 matches on 1 page) - 1 2. Syntax problem: String object invalid (odd number of hexadecimal characters) I think the second error was due to the BOM. -- Leo On Sat, 3 Nov 2018 at 13:11, luigi scarso wrote:

On Fri, Nov 2, 2018 at 9:03 PM Leo Nikkilä wrote:

...

I tried PDF/A a while back and noticed the XMP header has an extra byte order mark which validators flagged as “??”.

I’ve attached the patch I used to remove it, however I’m still on an old version of ConTeXt so this might not apply cleanly to yours.

You might need to open the patch in a hex editor to see the difference in the two lines as most text editors will not show the BOM.

-- Leo

Thank you for the patch. Which validator are you referring to?

-- luigi

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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net

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