Duplicate property or field node 'pdf:Producer'

[ToM_1st]

When reading a PDF file I get the following exception:

Duplicate property or field node 'pdf:Producer'

Caused by: com.adobe.xmp.XMPException: Duplicate property or field node 'pdf:Producer'
    at com.adobe.xmp.impl.XMPNode.assertChildNotExisting(Unknown Source)
    at com.adobe.xmp.impl.XMPNode.addChild(Unknown Source)
    at com.adobe.xmp.impl.ParseRDF.addChildNode(Unknown Source)
    at com.adobe.xmp.impl.ParseRDF.rdf_LiteralPropertyElement(Unknown Source)
    at com.adobe.xmp.impl.ParseRDF.rdf_PropertyElement(Unknown Source)
    at com.adobe.xmp.impl.ParseRDF.rdf_PropertyElementList(Unknown Source)
    at com.adobe.xmp.impl.ParseRDF.rdf_NodeElement(Unknown Source)
    at com.adobe.xmp.impl.ParseRDF.rdf_NodeElementList(Unknown Source)
    at com.adobe.xmp.impl.ParseRDF.rdf_RDF(Unknown Source)
    at com.adobe.xmp.impl.ParseRDF.parse(Unknown Source)
    at com.adobe.xmp.impl.XMPMetaParser.parse(Unknown Source)
    at com.adobe.xmp.XMPMetaFactory.parseFromBuffer(Unknown Source)
    at com.adobe.xmp.XMPMetaFactory.parseFromBuffer(Unknown Source)

When I open the PDF there is indeed a redundant entry:

<x:xmpmeta x:xmptk="Adobe XMP Core 5.1.0-jc003" xmlns:x="adobe:ns:meta/">

  <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">

    <rdf:Description dc:format="application/pdf" pdf:Producer="Some producer" pdfaid:conformance="B" pdfaid:part="1" rdf:about="" ...>

...

<pdf:Producer>Some producer</pdf:Producer>

</rdf:Description>

</rdf:RDF>

I have found PDFs which contain one or the other but not both. So who is wrong? (I am using the XMP lib in version 5.1.3)

[Moved out of the XMP SDK forum and into a PDF-specific forum by a moderator]

[Bernd Alheit]

Looks like a bug in the XMP lib.

[ToM_1st]

I tried the latest version 6.1.10 with the same result. I mean the lib is right, there are two "pdf:producers" so my question is whether one of the above is invalid/forbidden?

[Bernd Alheit]

One is an attribute of a XML tag. The other is a XML tag.

[ToM_1st]

Yes that (as a developer) I know - the question is where the error is:

1. Both producer are valid - its a bug in XMP library

2. One producer is ok (the tag or the attribute version) but not two

3. The "xml attribute" producer is correct the other is not

4. The "xml tag" producer is correct the other is not

So which one is it? I browsed the adobe XMP spec but didn't find any concrete information about that. (But maybe i missed something)

[Bernd Alheit]

I don't know.

[ToM_1st]

You don't need to answer then

But since this is a forum somebody else might know

[ToM_1st]

[Moved out of the XMP SDK forum and into a PDF-specific forum by a moderator]

Why was this post moved to such in irrelevant forum?

I am using the Java XMP SDK and have a specific question about an error message which appears when I use the API! Please move this post back to where it belongs! This has nothing to do with "Editing or Exporting PDFs"!!!

Here is how I call the XMP SDK:

byte[] xmpMeta = //retrieve Metada from PDF
XMPMetaFactory.parseFromBuffer(xmpMeta);

This call fails with the above exception...