[NTG-context] non standard tag for structure

[NTG-context] non standard tag for structure

[Pablo Rodriguez via ntg-context]

Hans,

with the following source, veraPDF-1.29.11 complains about a
non-standard tag named /documentpart:

    \setuptagging[state=start]

    \setupbackend
      [format=PDF/A-3a,
       intent=sRGB IEC61966-2.1,
       level=0]

    \starttext
      whatever

      \pdfbackendactualtext{abc}{hoh}
    \stoptext

The problematic object reads:

    4 0 obj
    <<
      /K 28 0 R
      /ParentTree 5 0 R
      /RoleMap <<
        /break /NonStruct
        /document /Document
        /documentpart /DocumentFragment
        /navigationpage /NonStruct
      >>
      /Type /StructTreeRoot
    >>
    endobj

If I replace (according to
https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf#nameddest=G13.2348782)
/documentpart with /Part, validation in veraPDF is perfectly fine.

BTW, /DocumentFragment seems not to be included in PDF-1.7
(https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf#search=DocumentFragment).

According to
https://github.com/veraPDF/veraPDF-model/blob/4c8e855b68546547971121281ff2ab3d1b822900/src/main/java/SALayer.mdl#L358,
/DocumentFragment seems to be only available in PDF-2.0.

Providing a patch for strc-tag.lmt would be easy, but this would affect
to ua-2 (which may use /DocumentFragment).

Many thanks for your help,

Pablo


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[NTG-context] Re: non standard tag for structure

[Steffen Wolfrum]

Hi Pablo, Wolfgang, Hans,

is there any news on the accessibility topic (text Alt on a specific image element)?

Yours, Steffen



> Am 25.02.2025 um 17:45 schrieb Pablo Rodriguez via ntg-context <ntg-context@ntg.nl>:
> 
> Hans,
> 
> with the following source, veraPDF-1.29.11 complains about a
> non-standard tag named /documentpart:
> 
>   \setuptagging[state=start]
> 
>   \setupbackend
>     [format=PDF/A-3a,
>      intent=sRGB IEC61966-2.1,
>      level=0]
> 
>   \starttext
>     whatever
> 
>     \pdfbackendactualtext{abc}{hoh}
>   \stoptext
> 
> The problematic object reads:
> 
>   4 0 obj
>   <<
>     /K 28 0 R
>     /ParentTree 5 0 R
>     /RoleMap <<
>       /break /NonStruct
>       /document /Document
>       /documentpart /DocumentFragment
>       /navigationpage /NonStruct
>>> 
>     /Type /StructTreeRoot
>>> 
>   endobj
> 
> If I replace (according to
> https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf#nameddest=G13.2348782)
> /documentpart with /Part, validation in veraPDF is perfectly fine.
> 
> BTW, /DocumentFragment seems not to be included in PDF-1.7
> (https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf#search=DocumentFragment).
> 
> According to
> https://github.com/veraPDF/veraPDF-model/blob/4c8e855b68546547971121281ff2ab3d1b822900/src/main/java/SALayer.mdl#L358,
> /DocumentFragment seems to be only available in PDF-2.0.
> 
> Providing a patch for strc-tag.lmt would be easy, but this would affect
> to ua-2 (which may use /DocumentFragment).
> 
> Many thanks for your help,
> 
> Pablo
> 
> 
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki     : https://wiki.contextgarden.net
> ___________________________________________________________________________________

___________________________________________________________________________________
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___________________________________________________________________________________

[NTG-context] Re: non standard tag for structure

[Pablo Rodriguez via ntg-context]

On 3/23/25 14:47, Steffen Wolfrum wrote:
> Hi Pablo, Wolfgang, Hans,
>
> is there any news on the accessibility topic (text Alt on a specific
> image element)?

Hi Steffen,

I’m afraid that the some delay in new versions because of the release of
TeX Live 2025 has been one of the few recent messages to the list from Hans.

Not that anyone told me anything, but I guess he must be busy with other
things (or he is just relaxing).

I’m also interested in other things related to ConTeXt (and parallel
texts), but there was no reply.

So we will have to wait until Hans might have more time “to deal with
the list”.

Sorry, but this is the best news we seem to have. Cheers,

Pablo
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___________________________________________________________________________________

[NTG-context] Re: non standard tag for structure

[Hans Hagen]

On 3/25/2025 6:22 PM, Pablo Rodriguez via ntg-context wrote:
> On 3/23/25 14:47, Steffen Wolfrum wrote:
>> Hi Pablo, Wolfgang, Hans,
>>
>> is there any news on the accessibility topic (text Alt on a specific
>> image element)?
> 
> Hi Steffen,
> 
> I’m afraid that the some delay in new versions because of the release of
> TeX Live 2025 has been one of the few recent messages to the list from Hans.
> 
> Not that anyone told me anything, but I guess he must be busy with other
> things (or he is just relaxing).
> 
> I’m also interested in other things related to ConTeXt (and parallel
> texts), but there was no reply.
> 
> So we will have to wait until Hans might have more time “to deal with
> the list”.
> 
> Sorry, but this is the best news we seem to have. Cheers,

- less screen time due to eye infection
- currently MS and I are in metapost (fun) mode
- maybe an update in a week or so

Hans

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___________________________________________________________________________________

[NTG-context] Re: non standard tag for structure

[Pablo Rodriguez via ntg-context]

On 3/25/25 19:21, Hans Hagen wrote:
>> [...]
>> Sorry, but this is the best news we seem to have. Cheers,
>
> - less screen time due to eye infection

Get well soon (to just relax, not to deal with the list 😜).

Pablo
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[NTG-context] Re: non standard tag for structure

[Steffen Wolfrum]

Hi Pablo,

meanwhile there is a new thread by Matthias Weber, called «Alternate text for images?»
Does this thread cover the same topic as this one, i.e. is Matthias’ thread the successor to this one here?

Best wishes, Steffen


> Am 25.03.2025 um 18:22 schrieb Pablo Rodriguez via ntg-context <ntg-context@ntg.nl>:
> 
> On 3/23/25 14:47, Steffen Wolfrum wrote:
>> Hi Pablo, Wolfgang, Hans,
>> 
>> is there any news on the accessibility topic (text Alt on a specific
>> image element)?
> 
> Hi Steffen,
> 
> I’m afraid that the some delay in new versions because of the release of
> TeX Live 2025 has been one of the few recent messages to the list from Hans.
> 
> Not that anyone told me anything, but I guess he must be busy with other
> things (or he is just relaxing).
> 
> I’m also interested in other things related to ConTeXt (and parallel
> texts), but there was no reply.
> 
> So we will have to wait until Hans might have more time “to deal with
> the list”.
> 
> Sorry, but this is the best news we seem to have. Cheers,
> 
> Pablo
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki     : https://wiki.contextgarden.net
> ___________________________________________________________________________________

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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___________________________________________________________________________________

[NTG-context] Re: non standard tag for structure

[Pablo Rodriguez via ntg-context]

On 4/10/25 15:44, Steffen Wolfrum wrote:
> Hi Pablo,
>
> meanwhile there is a new thread by Matthias Weber, called «Alternate
> text for images?»> Does this thread cover the same topic as this one, i.e. is Matthias’
> thread the successor to this one here?
Hi Steffen,

you can forget this thread in favour of “Alternate text for images?”.

I was ignorant when I started the thread that there was:

  \enabledirectives [backend.usetags=crap]

This was the way to avoid the use of the right tagging for PDF/UA-1.

I hope it is clearer now,

Pablo
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