Oh, I'm afraid that my “I hope for the future.” has now led to a misunderstanding.

I would like to archive my documents as pdf/A-2a. As a reference to the German Bundesarchiv, which recommends pdf/A-2a in the first instance - and pdf/A-2u in the second.

I simply noticed that, as described in my initial email, the pdf/A-1a and pdf/A-2a variants do not pass the validation test with verapdf.

Since there seems to be no way around this, I will probably have to fall back on the second recommendation.

Greetings

Am 12.09.24 um 21:00 schrieb Ulrike Fischer:

Am Thu, 12 Sep 2024 18:05:05 +0200 schrieb Hans Hagen:

I didn't think that my example was too complex.
pdf/A-2a works with ConTeXt, it is recognized as pdf/A by FoxitReader. 
However, I would like the result to be valid, as with pdf/A-2u.

Does anyone else have any tips or ideas? Is it not that important?

i have no time for validation / tagging now but you can try

% \setupbackend[format=pdf/ua-2]
% \setuptagging[state=start]

pdf/A-2a is not pdf/ua-2. pdf/A-2a is for pdf 1.7 or less, so you
would need pdf/ua-1 as accompanying accessibility standard and not
ua-2 which is for pdf 2.0.

But if context still maps everything to NonStruct it can't claim
that the document is pdf/ua-1. The UA-standards clearly require that
structures elements should be semantically appropriate. 

I don't own the pdf/A-2 standard so I don't know how it exactly
defines the accessibility for the "a" in 2a, so it could be enough
to simply enable tagging.