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https://issues.apache.org/jira/browse/TIKA-4891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18114719#comment-18114719
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Tilman Hausherr edited comment on TIKA-4891 at 9/13/26 8:55 AM:
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[~lfoppiano] it's about having the structure tree content, it doesn't matter
whether it is correct PDF/UA, but such files are more likely to have it.
!screenshot-1.png!
You either need Adobe Professional or the (free) PDF-X-Change viewer to see
these structures in the PDF.
!image-2026-09-13-10-54-59-251.png!
was (Author: tilman):
[~lfoppiano] it's about having the structure tree content, it doesn't matter
whether it is correct PDF/UA, but such files are more likely to have it.
!screenshot-1.png!
You either need Adobe Professional or the (free) PDF-X-Change viewer to see
these structures in the PDF.
> Improve handling of PDF/UA structural tags/marked content
> ---------------------------------------------------------
>
> Key: TIKA-4891
> URL: https://issues.apache.org/jira/browse/TIKA-4891
> Project: Tika
> Issue Type: Task
> Reporter: Tim Allison
> Priority: Major
> Attachments: 1008690.pdf, image-2026-09-13-10-54-59-251.png,
> screenshot-1.png
>
>
> PDF/UA includes structural markup. We hacked out a standalone handler for
> this back in 1.x but haven't touched it in years.
>
> We should modernize our handling of structural tags and eventually consider
> turning that on by default. That decision will be based on evaluation on
> 1000s of PDFs. This is not a default switch to be taken lightly.
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