\setupbackend[
format={pdf/ua-1},
profile={default_rgb.icc,default_gray.icc},
]

\setuptagging
  [state=start]

\enabledirectives
  [backend.usetags=mkiv]

  \starttext
  a
  \stoptext

is green with VeraPDF!

format={pdf/ua-2} is not defined I think, see: https://source.contextgarden.net/tex/context/base/mkiv/lpdf-fmt.lua

Greetings
Thomas

Am 16.02.25 um 10:03 schrieb Pablo Rodriguez via ntg-context:
On 2/15/25 19:29, Steffen Wolfrum wrote:
[...]
Do I understand you correctly that it would be interesting to know
program, version number and OS of the program with which they tested
our PDF, unsuccessfully?
Hi Steffen,

on a second thought, only the program would be required.

It would be the easiest way to replicate their tests. I mean, if they
use a publicly-available validator.

Otherwise, it will be really hard to test accessibility for PDF
documents by ourselves.

But for now, I have tested this with the VeraPDF validator and I have
found another issue.

If you don’t mind, I will open a new thread.

Best,

Pablo
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