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https://issues.apache.org/jira/browse/PDFBOX-5976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17937381#comment-17937381
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Tilman Hausherr commented on PDFBOX-5976:
-----------------------------------------
I'm afraid this won't be fixed anytime soon. I have made several attempts on
similar problems but wasn't successful on all.
A workaround is to use Jempbox, but that one also failed with your file :-(
{code:java}
XMPMetadata xmp = XMPMetadata.load(new
ByteArrayInputStream(s.getBytes()));
xmp.addXMLNSMapping(XMPSchemaPDFAId.NAMESPACE, XMPSchemaPDFAId.class);
XMPSchemaPDFAId schema = (XMPSchemaPDFAId)
xmp.getSchemaByClass(XMPSchemaPDFAId.class);
System.out.println(schema.getConformance() + " " + schema.getPart());
{code}
> DomXmpParser incorrectly expects namespaces on attribute level
> --------------------------------------------------------------
>
> Key: PDFBOX-5976
> URL: https://issues.apache.org/jira/browse/PDFBOX-5976
> Project: PDFBox
> Issue Type: Bug
> Components: XmpBox
> Affects Versions: 3.0.4 PDFBox
> Reporter: Jochen Stärk
> Priority: Major
> Labels: xml
> Attachments: AN-10005_v28_2025-03-19-2.pdf,
> AN-10005_v28_2025-03-19x-1.pdf
>
>
> When trying to determine the PDF-A-Version like
> {{PDDocument document = null;}}
> {{try {}}
> {{document = Loader.loadPDF(new File("AN-10005_v28_2025-03-19.pdf"));}}
> {{PDDocumentCatalog catalog = document.getDocumentCatalog();}}
> {{PDMetadata metadata = catalog.getMetadata();}}
> {{DomXmpParser xmpParser = new DomXmpParser();}}
> {{XMPMetadata xmp = xmpParser.parse(metadata.createInputStream());}}
> {{PDFAIdentificationSchema pdfaSchema = xmp.getPDFAIdentificationSchema();}}
> {{if (pdfaSchema != null) {}}
> {{System.out.println("It's a PDF A-" + pdfaSchema.getPart());}}
> {{}}}
> {{document.close();}}
> {{} catch (XmpParsingException e) {}}
> {{e.printStackTrace();}}
> {{} catch (IOException e) {}}
> {{e.printStackTrace();}}
> {{}}}
> on the attached (and valid) PDF A-3b AN-10005_v28_2025-03-19-2.pdf, PDFBox
> incorrectly fails with a
>
> {{org.apache.xmpbox.xml.XmpParsingException: Schema is not set in this
> document : http://www.aiim.org/pdfa/ns/id/}}
> {{ at
> org.apache.xmpbox.xml.DomXmpParser.checkPropertyDefinition(DomXmpParser.java:920)}}
> {{ at
> org.apache.xmpbox.xml.DomXmpParser.parseDescriptionRootAttr(DomXmpParser.java:276)}}
> {{ at
> org.apache.xmpbox.xml.DomXmpParser.parseDescriptionRoot(DomXmpParser.java:247)}}
> {{ at org.apache.xmpbox.xml.DomXmpParser.parse(DomXmpParser.java:201)}}
> {{ at de.usegroup.Main.main(Main.java:25)}}
>
> After manipulating the metadata stream with itext RuPS from
> {{<rdf:RDF xmlns:pdf="http://ns.adobe.com/pdf/1.3/";
> xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/";
> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";><rdf:Description
> rdf:about="" pdfaid:part="3" pdfaid:conformance="B" /><rdf:Description
> rdf:about="" pdf:Producer="WeasyPrint 64.1" /></rdf:RDF>}}
> to
> {{ <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";>}}
> {{ <rdf:Description rdf:about=""}}
> {{ xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/"}}
> {{ xmlns:pdf="http://ns.adobe.com/pdf/1.3/"}}
> {{ xmlns:xmp="http://ns.adobe.com/xap/1.0/"}}
> {{ pdfaid:conformance="B"}}
> {{ pdfaid:part="3"}}
> {{ pdf:Producer="WeasyPrint 64.1; modified using iText® Core 7.2.5
> (AGPL version) ©2000-2023 iText Group NV"}}
> {{ xmp:ModifyDate="2025-03-21T08:16:58+01:00"/>}}
> {{ </rdf:RDF>}}
> putting the namespace definition in the rdf:Description
> (AN-10005_v28_2025-03-19x-1.pdf) it works.
> The issue is: it should be sufficient to put the namespace definitions in the
> root element, "RDF", i.e. the first example should also work.
>
> When searching for similar issues I had the impression this may be similar to
> your issue #2219
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