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https://issues.apache.org/jira/browse/PDFBOX-2896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14635659#comment-14635659
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Maruan Sahyoun commented on PDFBOX-2896:
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Acrobat X thinks it's fine - will test with other versions later.
> XMPBox not creating valid "title" entry in DublinCoreSchema in trunk
> --------------------------------------------------------------------
>
> Key: PDFBOX-2896
> URL: https://issues.apache.org/jira/browse/PDFBOX-2896
> Project: PDFBox
> Issue Type: Bug
> Components: XmpBox
> Affects Versions: 2.0.0
> Reporter: Tim Allison
> Priority: Minor
>
> On TIKA-1678, I was trying to generate a test PDF that had a dc:title in the
> XMP with XMPBox from PDFBox's trunk. I modified the code from CreatePDFA by
> adding this:
> {code}
> DublinCoreSchema dc = xmp.createAndAddDublinCoreSchema();
> dc.setTitle("this is the title");
> {code}
> The generated PDF doesn't appear to have a compliant dc:title entry in the
> XMP.
> [~tilman] noted the divergence from the standard
> [here|https://issues.apache.org/jira/browse/TIKA-1678?focusedCommentId=14634045&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14634045].
> What PDFBox does:
> {code}
> <dc:title>
> <rdf:Alt>
> <dc:li>this is the title</dc:li>
> </rdf:Alt>
> </dc:title>
> {code}
> It should be:
> {code}
> <dc:title>
> <rdf:Alt>
> <rdf:li xml:lang="x-default">this is the title</rdf:li>
> </rdf:Alt>
> </dc:title>
> {code}
> Error message from the PDF-Tools validator:
> {quote}
> 'dc:li' is not allowed in arrays. The elements must be rdf:li or rdf:_N,
> where N is a positive number.
> There is only one RDF resource allowed in XMP.
> {quote}
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