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https://issues.apache.org/jira/browse/PDFBOX-2804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14559761#comment-14559761
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Maruan Sahyoun commented on PDFBOX-2804:
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[~tilman] I have to correct myself as I haven't completely looked at the
information above and the PDF spec completely. If the dictionary entry has an
indirect null object it's the same as a non existent entry.
{quote}
A dictionary entry whose value is null (see Section 3.2.8, “The Null Object”)
is equivalent to an absent entry. [PDF 1.4]
{quote}
Thanks to Olaf for clarifying this.
> Validate PDF/A-1b files of veraPDF project
> ------------------------------------------
>
> Key: PDFBOX-2804
> URL: https://issues.apache.org/jira/browse/PDFBOX-2804
> Project: PDFBox
> Issue Type: Task
> Components: Preflight
> Affects Versions: 2.0.0
> Reporter: Tilman Hausherr
> Labels: veraPDF
> Attachments: authormissing.pdf
>
>
> Validate the PDF/A-1b test files of the veraPDF project:
> https://github.com/veraPDF/veraPDF-corpus-PDFA-1b
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