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Posted to fop-users@xmlgraphics.apache.org by "Stenersen, Björn WI (Fa. Kessler Beratung)" <Bj...@schufa.de> on 2013/08/01 13:56:17 UTC
Problem with XMP-Metadata and PDF/A-Validation
Hello,
i am trying to create a pdf/a with FOP 1.1, but the validation of the generated PDF always fails due to corrupt xmp-metadata.
I tried several Validators, all of them report the same error:
XMP metadata: Property 'language' in predefined XMP schema 'http://purl.org/dc/elements/1.1/' for PDF/A has wrong value type (must be 'rdf:bag')
(http://www.pdflib.com/knowledge-base/xmp-metadata/free-xmp-validator/)
So I tried to fix the problem by declaring the language-property in my fo:declarations-section:
<fo:declarations>
<x:xmpmeta xmlns:x="adobe:ns:meta/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xmp="http://ns.adobe.com/xap/1.0/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<dc:creator>
<rdf:Seq>
<rdf:li>
CREATOR
</rdf:li>
</rdf:Seq>
</dc:creator>
<dc:language>
<rdf:Bag>
<rdf:li>
de-DE
</rdf:li>
</rdf:Bag>
</dc:language>
<dc:date>
<rdf:Seq>
<rdf:li>1999-08-01T12:56:02+02:00</rdf:li>
</rdf:Seq>
</dc:date>
<xmp:CreatorTool>My App</xmp:CreatorTool>
</x:xmpmeta>
</fo:declarations>
In the resulting PDF the metadata looks like this:
<?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:dc="http://purl.org/dc/elements/1.1/" rdf:about="">
<dc:format>application/pdf</dc:format>
<dc:language>x-unknown</dc:language>
<dc:creator>
<rdf:Seq>
<rdf:li>CREATOR</rdf:li>
</rdf:Seq>
</dc:creator>
<dc:date>
<rdf:Seq>
<rdf:li>1999-08-01T12:56:02+02:00</rdf:li>
<rdf:li>2013-08-01T13:53:08+02:00</rdf:li>
</rdf:Seq>
</dc:date>
</rdf:Description>
<rdf:Description xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/" rdf:about="">
<pdfaid:conformance>B</pdfaid:conformance>
<pdfaid:part>1</pdfaid:part>
</rdf:Description>
<rdf:Description xmlns:pdf="http://ns.adobe.com/pdf/1.3/" rdf:about="">
<pdf:PDFVersion>1.4</pdf:PDFVersion>
<pdf:Producer>Apache FOP Version SVN tags/fop-1_1</pdf:Producer>
</rdf:Description>
<rdf:Description xmlns:xmp="http://ns.adobe.com/xap/1.0/" rdf:about="">
<xmp:CreateDate>2013-08-01T13:53:08+02:00</xmp:CreateDate>
<xmp:CreatorTool>My App</xmp:CreatorTool>
<xmp:MetadataDate>2013-08-01T13:53:08+02:00</xmp:MetadataDate>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>
<?xpacket end="r"?>
Is anyone experiencing the same problem? Any tips how to fix this?
Thanks Björn
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Re: Problem with XMP-Metadata and PDF/A-Validation
Posted by "Terence M. Bandoian" <te...@tmbsw.com>.
On 8/5/2013 2:24 AM, stenersen wrote:
> I just tried to use FOP 1.0 and it works!
> So i had a look at the code and found out that in the constructor of
> org.apache.fop.pdf.PDFRoot:75 the line
>
> setLanguage("x-unknown");
>
> overrides my property. This line is new in FOP 1.1. Is this a bug?
Hi, Björn-
Good catch. I should have mentioned that I used version 1.0.
-Terence Bandoian
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Re: Problem with XMP-Metadata and PDF/A-Validation
Posted by stenersen <bj...@kessler-beratung.de>.
I just tried to use FOP 1.0 and it works!
So i had a look at the code and found out that in the constructor of
org.apache.fop.pdf.PDFRoot:75 the line
setLanguage("x-unknown");
overrides my property. This line is new in FOP 1.1. Is this a bug?
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Re: Problem with XMP-Metadata and PDF/A-Validation
Posted by stenersen <bj...@kessler-beratung.de>.
Hi Terence,
i tried your syntax but nothing changed.
<dc:language>
<rdf:Bag>
<rdf:li>
de-DE
</rdf:li>
</rdf:Bag>
</dc:language>
is sill removed by fop and printed as
<dc:language>x-unknown</dc:language>
to the xmp-metadata.
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Re: Problem with XMP-Metadata and PDF/A-Validation
Posted by "Terence M. Bandoian" <te...@tmbsw.com>.
On 8/1/2013 6:56 AM, "Stenersen, Björn WI \(Fa. Kessler Beratung\)" wrote:
> Hello,
> i am trying to create a pdf/a with FOP 1.1, but the validation of the generated PDF always fails due to corrupt xmp-metadata.
> I tried several Validators, all of them report the same error:
>
> XMP metadata: Property 'language' in predefined XMP schema 'http://purl.org/dc/elements/1.1/' for PDF/A has wrong value type (must be 'rdf:bag')
> (http://www.pdflib.com/knowledge-base/xmp-metadata/free-xmp-validator/)
>
> So I tried to fix the problem by declaring the language-property in my fo:declarations-section:
>
> <fo:declarations>
> <x:xmpmeta xmlns:x="adobe:ns:meta/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xmp="http://ns.adobe.com/xap/1.0/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
> <dc:creator>
> <rdf:Seq>
> <rdf:li>
> CREATOR
> </rdf:li>
> </rdf:Seq>
> </dc:creator>
> <dc:language>
> <rdf:Bag>
> <rdf:li>
> de-DE
> </rdf:li>
> </rdf:Bag>
> </dc:language>
> <dc:date>
> <rdf:Seq>
> <rdf:li>1999-08-01T12:56:02+02:00</rdf:li>
> </rdf:Seq>
> </dc:date>
> <xmp:CreatorTool>My App</xmp:CreatorTool>
> </x:xmpmeta>
> </fo:declarations>
>
> In the resulting PDF the metadata looks like this:
>
> <?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:dc="http://purl.org/dc/elements/1.1/" rdf:about="">
> <dc:format>application/pdf</dc:format>
> <dc:language>x-unknown</dc:language>
> <dc:creator>
> <rdf:Seq>
> <rdf:li>CREATOR</rdf:li>
> </rdf:Seq>
> </dc:creator>
> <dc:date>
> <rdf:Seq>
> <rdf:li>1999-08-01T12:56:02+02:00</rdf:li>
> <rdf:li>2013-08-01T13:53:08+02:00</rdf:li>
> </rdf:Seq>
> </dc:date>
> </rdf:Description>
> <rdf:Description xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/" rdf:about="">
> <pdfaid:conformance>B</pdfaid:conformance>
> <pdfaid:part>1</pdfaid:part>
> </rdf:Description>
> <rdf:Description xmlns:pdf="http://ns.adobe.com/pdf/1.3/" rdf:about="">
> <pdf:PDFVersion>1.4</pdf:PDFVersion>
> <pdf:Producer>Apache FOP Version SVN tags/fop-1_1</pdf:Producer>
> </rdf:Description>
> <rdf:Description xmlns:xmp="http://ns.adobe.com/xap/1.0/" rdf:about="">
> <xmp:CreateDate>2013-08-01T13:53:08+02:00</xmp:CreateDate>
> <xmp:CreatorTool>My App</xmp:CreatorTool>
> <xmp:MetadataDate>2013-08-01T13:53:08+02:00</xmp:MetadataDate>
> </rdf:Description>
> </rdf:RDF>
> </x:xmpmeta>
> <?xpacket end="r"?>
>
> Is anyone experiencing the same problem? Any tips how to fix this?
>
> Thanks Björn
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: fop-users-unsubscribe@xmlgraphics.apache.org
> For additional commands, e-mail: fop-users-help@xmlgraphics.apache.org
>
>
Hi, Björn-
I used something like this:
<fo:declarations>
<x:xmpmeta xmlns:x="adobe:ns:meta/">
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:dc="http://purl.org/dc/elements/1.1/">
<rdf:Description rdf:about="">
<dc:title>
<rdf:Alt>
<rdf:li xml:lang="x-default">
<xsl:value-of select="//title" />
</rdf:li>
</rdf:Alt>
</dc:title>
...
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>
</fo:declarations>
and was able to successfully validate the output as PDF/A.
-Terence Bandoian
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