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 :

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....) /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....).

According to https://github.com/veraPDF/veraPDF-model/blob/4c8e855b68546547971121281ff2ab..., /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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