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https://issues.apache.org/jira/browse/PDFBOX-4860?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17126391#comment-17126391
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ASF subversion and git services commented on PDFBOX-4860:
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Commit 1878494 from Tilman Hausherr in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1878494 ]
PDFBOX-4860: check uniqueness of certain properties
> Preflight doesn't catch repetition of elements in XMP
> -----------------------------------------------------
>
> Key: PDFBOX-4860
> URL: https://issues.apache.org/jira/browse/PDFBOX-4860
> Project: PDFBox
> Issue Type: Bug
> Components: Preflight
> Affects Versions: 2.0.19
> Reporter: Tilman Hausherr
> Priority: Major
> Fix For: 3.0.0 PDFBox, 2.0.21
>
> Attachments: Testdok-modified-003.pdf
>
>
> We don't catch this:
> [https://www.pdf-online.com/osa/validate.aspx]
> {quote}
> Validating file "Testdok-modified-003.pdf" for conformance level pdfa-1a
> Multiple occurrences of property 'pdf:Producer'.
> Multiple occurrences of property 'xmp:CreateDate'.
> Multiple occurrences of property 'xmp:CreatorTool'.
> The value of the key ToUnicode is invalid but must be compliant to the
> ToUnicode CMap format.
> The document does not conform to the requested standard.
> The document contains fonts without appropriate character to unicode mapping
> information (ToUnicode maps).
> The document's meta data is either missing or inconsistent or corrupt.
> The document does not conform to the PDF/A-1a standard.
> Done.
> {quote}
> I'm only focusing on the repetition in this issue.
>
> {code:xml}
> <?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?><x:xmpmeta
> xmlns:x="adobe:ns:meta/">
> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";>
> <rdf:Description xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/";
> rdf:about="">
> <pdfaid:part>1</pdfaid:part>
> <pdfaid:conformance>A</pdfaid:conformance>
> </rdf:Description>
> <rdf:Description xmlns:pdf="http://ns.adobe.com/pdf/1.3/"; rdf:about="">
> <pdf:Producer>LibreOffice 5.4</pdf:Producer>
> </rdf:Description>
> <rdf:Description xmlns:xmp="http://ns.adobe.com/xap/1.0/"; rdf:about="">
> <xmp:CreatorTool>Writer</xmp:CreatorTool>
> <xmp:CreateDate>2020-05-31T20:54:08+02:00</xmp:CreateDate>
> </rdf:Description>
> <rdf:Description xmlns:pdf="http://ns.adobe.com/pdf/1.3/"; rdf:about="">
> <pdf:Keywords/>
> <pdf:Producer>LibreOffice 5.4</pdf:Producer>
> </rdf:Description>
> <rdf:Description xmlns:xmp="http://ns.adobe.com/xap/1.0/"; rdf:about="">
> <xmp:ModifyDate>2020-06-03T08:38:15+02:00</xmp:ModifyDate>
> <xmp:CreateDate>2020-05-31T20:54:08+02:00</xmp:CreateDate>
> <xmp:CreatorTool>Writer</xmp:CreatorTool>
> <xmp:MetadataDate>2020-06-03T08:38:15+02:00</xmp:MetadataDate>
> </rdf:Description>
> <rdf:Description xmlns:dc="http://purl.org/dc/elements/1.1/"; rdf:about="">
> <dc:title>
> <rdf:Alt>
> <rdf:li xml:lang="x-default">Default Title</rdf:li>
> </rdf:Alt>
> </dc:title>
> <dc:creator>
> <rdf:Seq>
> <rdf:li>PDFBox</rdf:li>
> </rdf:Seq>
> </dc:creator>
> <dc:description>
> <rdf:Alt>
> <rdf:li xml:lang="x-default">Default Subject</rdf:li>
> </rdf:Alt>
> </dc:description>
> </rdf:Description>
> </rdf:RDF>
> </x:xmpmeta><?xpacket end="w"?>
> {code}
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