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https://issues.apache.org/jira/browse/PDFBOX-5835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17853936#comment-17853936
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Tilman Hausherr commented on PDFBOX-5835:
-----------------------------------------
I fixed that bug anyway; I'll try to work on the actual issue at a later time.
(I tried last year and didn't succeed)
> DomXmpParser - IllegalArgumentException: prefix cannot be "null" when
> creating a QName
> --------------------------------------------------------------------------------------
>
> Key: PDFBOX-5835
> URL: https://issues.apache.org/jira/browse/PDFBOX-5835
> Project: PDFBox
> Issue Type: Bug
> Components: XmpBox
> Affects Versions: 3.0.2 PDFBox
> Reporter: Oliver Schmidtmer
> Priority: Major
>
> I've got a PDF from, where parsing the metadata fails with an
> IllegalArgumentException
> {code:java}
> java.lang.IllegalArgumentException: prefix cannot be "null" when creating a
> QName
> at java.xml/javax.xml.namespace.QName.<init>(QName.java:192)
> at org.apache.xmpbox.xml.DomHelper.getQName(DomHelper.java:99)
> at
> org.apache.xmpbox.xml.DomXmpParser.parseChildrenAsProperties(DomXmpParser.java:306)
> at
> org.apache.xmpbox.xml.DomXmpParser.parseDescriptionRoot(DomXmpParser.java:250)
> at org.apache.xmpbox.xml.DomXmpParser.parse(DomXmpParser.java:201)
> at org.apache.xmpbox.xml.DomXmpParser.parse(DomXmpParser.java:112)
> {code}
> This can be reproduced with a simple test, using the extracted metadata:
> {code:java}
> @Test
> void testDomXmpParser() throws XmpParsingException
> {
> // taken from file test-landscape2.pdf
> String xmpmeta = "<?xml version=\"1.0\" encoding=\"UTF-8\"
> standalone=\"no\"?>\n" +
> "<?xpacket begin=\"\uFEFF\"
> id=\"W5M0MpCehiHzreSzNTczkc9d\"?><x:xmpmeta xmlns:x=\"adobe:ns:meta/\"
> x:xmptk=\"FIS/xee\">\n" +
> " <rdf:RDF
> xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\";>\n" +
> " <rdf:Description
> xmlns:pdfaid=\"http://www.aiim.org/pdfa/ns/id/\";>\n" +
> " <pdfaid:part>3</pdfaid:part>\n" +
> " <pdfaid:conformance>A</pdfaid:conformance>\n" +
> " </rdf:Description>\n" +
> " <rdf:Description
> xmlns:pdfaExtension=\"http://www.aiim.org/pdfa/ns/extension/\";
> xmlns:pdfaField=\"http://www.aiim.org/pdfa/ns/field#\";
> xmlns:pdfaProperty=\"http://www.aiim.org/pdfa/ns/property#\";
> xmlns:pdfaSchema=\"http://www.aiim.org/pdfa/ns/schema#\";
> xmlns:pdfaType=\"http://www.aiim.org/pdfa/ns/type#\"; rdf:about=\"\"/>\n" +
> " <rdf:Description>\n" +
> " <schemas
> xmlns=\"http://www.aiim.org/pdfa/ns/extension/\";>\n" +
> " <rdf:Bag>\n" +
> " <rdf:li rdf:parseType=\"Resource\">\n" +
> " <schema
> xmlns=\"http://www.aiim.org/pdfa/ns/schema#\";>ZUGFeRD PDFA Extension
> Schema</schema>\n" +
> " <namespaceURI
> xmlns=\"http://www.aiim.org/pdfa/ns/schema#\";>urn:ferd:pdfa:CrossIndustryDocument:invoice:1p0#</namespaceURI>\n"
> +
> " <prefix
> xmlns=\"http://www.aiim.org/pdfa/ns/schema#\";>zf</prefix>\n" +
> " <property
> xmlns=\"http://www.aiim.org/pdfa/ns/schema#\";>\n" +
> " <rdf:Seq>\n" +
> " <rdf:li rdf:parseType=\"Resource\">\n" +
> " <name
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>DocumentFileName</name>\n" +
> " <valueType
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>Text</valueType>\n" +
> " <category
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>external</category>\n" +
> " <description
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>name of the embedded XML
> invoice file</description>\n" +
> " </rdf:li>\n" +
> " <rdf:li rdf:parseType=\"Resource\">\n" +
> " <name
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>DocumentType</name>\n" +
> " <valueType
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>Text</valueType>\n" +
> " <category
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>external</category>\n" +
> " <description
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>INVOICE</description>\n" +
> " </rdf:li>\n" +
> " <rdf:li rdf:parseType=\"Resource\">\n" +
> " <name
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>Version</name>\n" +
> " <valueType
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>Text</valueType>\n" +
> " <category
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>external</category>\n" +
> " <description
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>The actual version of the
> ZUGFeRD data</description>\n" +
> " </rdf:li>\n" +
> " <rdf:li rdf:parseType=\"Resource\">\n" +
> " <name
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>ConformanceLevel</name>\n" +
> " <valueType
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>Text</valueType>\n" +
> " <category
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>external</category>\n" +
> " <description
> xmlns=\"http://www.aiim.org/pdfa/ns/property#\";>The conformance level of the
> ZUGFeRD data</description>\n" +
> " </rdf:li>\n" +
> " </rdf:Seq>\n" +
> " </property>\n" +
> " </rdf:li>\n" +
> " </rdf:Bag>\n" +
> " </schemas>\n" +
> " </rdf:Description>\n" +
> " <rdf:Description
> xmlns:zf=\"urn:ferd:pdfa:CrossIndustryDocument:invoice:1p0#\" rdf:about=\"\"
> zf:ConformanceLevel=\"EXTENDED\" zf:DocumentFileName=\"ZUGFeRD-invoice.xml\"
> zf:DocumentType=\"INVOICE\" zf:Version=\"1.0\"/>\n" +
> " </rdf:RDF>\n" +
> "</x:xmpmeta><?xpacket end=\"w\"?>\n";
> DomXmpParser xmpParser = new DomXmpParser();
> xmpParser.setStrictParsing(false);
> XMPMetadata xmp = xmpParser.parse(xmpmeta.getBytes());
> }
> {code}
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