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https://issues.apache.org/jira/browse/TIKA-4241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17837806#comment-17837806
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Tim Allison commented on TIKA-4241:
-----------------------------------

They add a custom key in the trailer {{/AdditionalStreams}} whose value is a 
COSArray of [ mime, ref to bytes ].

> Consider handling LibreOffice's /AdditionalStreams "hybrid PDF" attachment 
> embedding in PDFs
> --------------------------------------------------------------------------------------------
>
>                 Key: TIKA-4241
>                 URL: https://issues.apache.org/jira/browse/TIKA-4241
>             Project: Tika
>          Issue Type: Task
>            Reporter: Tim Allison
>            Priority: Major
>         Attachments: testPDF_additionalStreams.pdf
>
>
> Some info here: 
> https://stackoverflow.com/questions/67358370/what-the-standard-used-by-a-hybrid-pdf-file
> This looks like a one-off kind of LibreOffice thing that is probably not in 
> the spec... I haven't actually checked, but I trust mkl.
> Is it worth it?



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