Hello,
Looking at the XMP Specification Part 1, section 7.2 Qualifiers I see in
example 2 a way to capture additional general qualifier metadata.
Snippet from XMP Specification Part 1:
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";
(c)Adobe Systems Incorporated, 2010 23
xmlns:dc="http://purl.org/dc/elements/1.1/";
xmlns:xmp="http://ns.adobe.com/xap/1.0/";
xmlns:xe="http://ns.adobe.com/xmp-example/";>
<!-- elements removed for brevity -->
<dc:subject>
<rdf:Bag>
<rdf:li>XMP</rdf:li>
<rdf:li>
<rdf:Description>
<rdf:value>metadata</rdf:value>
<xe:qualifier>artificial example</xe:qualifier>
</rdf:Description>
</rdf:li>
<rdf:li>ISO standard</rdf:li>
</rdf:Bag>
</dc:subject>
</rdf:Description>
</rdf:RDF>
I created a XmpQualifier object with a method that outputs the RDF/XML for the
qualifiers.
<plm:car>
<rdf:Bag>
<rdf:li>
<rdf:Description xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";>
<rdf:value>Automobile</rdf:value>
<plm:color
xmlns:plm="http://something.llnl.gov/elements";>red</plm:color>
<plm:model xmlns:plm="http://
something.llnl.gov/elements">Valiant</plm:model>
<plm:model_year xmlns:plm="http://
something.llnl.gov/elements">1962</plm:model_year>
</rdf:Description>
</rdf:li>
</rdf:Bag>
</plm:car>
Then convert all of the brackets and quotes back to <>" because the XmpSchema
and XmpArray methods convert these values to XML entities. When I output the
PDF the data is in the XMP but has been converted to a RDF li parse type =
"Resource" and changes the name space XPath ID to plm_1_ from the original plm.
<plm:car>
<rdf:Bag>
<rdf:li rdf:parseType="Resource">
<rdf:value>Automobile</rdf:value>
<plm_1_:color>red</plm_1_:color>
<plm_1_:model>Valiant</plm_1_:model>
<plm_1_:model_year>1962</plm_1_:model_year>
</rdf:li>
</rdf:Bag>
</plm:car>
I am concerned that RDF/XML structure is being modified. Is there a better way
to add the qualifier data?
As I recall I found an example that uses iText that indicated that "iText"
went in one metadata field and "my app name" went in another. I believe that it
went on to talk about licensing issues. Alas I haven't been able to find it
again.
Thanks,
Chris Lindberg
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