I made a little example PDF based on the example at http://5stardata.info/ where document metadata is in the XMP itself, but document data is just a string value (this example uses JSON).
The same data from http://5stardata.info/gtd-5.html should be available in the attached, starting from http://5stardata.info/gtd-1.pdf. I thought a concrete example would help <x:xmpmeta xmlns:x="adobe:ns:meta/"> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";> <rdf:Description rdf:about="" xmlns:pdf="http://ns.adobe.com/pdf/1.3/"; xmlns:lod="http://5stardata.info/ns/linked-data"; xmlns:xmp="http://ns.adobe.com/xap/1.0/"; xmlns:dc="http://purl.org/dc/elements/1.1/"; xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/";> <pdf:Producer>Acrobat editing after Mac OS X 10.5.8 Quartz PDFContext</pdf:Producer> <lod:JSON-Data> {"#Galway":{"rdf:type":["http://purl.org/ns/meteo#Place"],"http://www.w3.org/2002/07/owl#sameAs": ["http://dbpedia.org/resource/Galway"],"http://purl.org/ns/meteo#forecast":["#forecast20101113","#forecast20101114","#forecast20101115"]},"#temp":{"http://www.w3.org/2000/01/rdf-schema#seeAlso":["http://dbpedia.org/resource/Temperature"],"http://www.w3.org/2002/07/owl#sameAs":["http://dbpedia.org/resource/Celsius"]},"#forecast20101113":{"http://purl.org/ns/meteo#predicted":["2010-11-13T00:00:00Z"],"http://purl.org/ns/meteo#temperature":["#temp20101113"]},"#temp20101113":{"http://purl.org/ns/meteo#celsius":["2"]},"#forecast20101114":{"http://purl.org/ns/meteo#predicted":["2010-11-14T00:00:00Z"],"http://purl.org/ns/meteo#temperature":["#temp20101114"]},"#temp20101114":{"http://purl.org/ns/meteo#celsius":["4"]},"#forecast20101115":{"http://purl.org/ns/meteo#predicted":["2010-11-15T00:00:00Z"],"http://purl.org/ns/meteo#temperature":["#temp20101115"]}, "#temp20101115":{"http://purl.org/ns/meteo#celsius":["7"]}}</lod:JSON-Data> <xmp:CreateDate>2012-01-22T15:00:00-08:00</xmp:CreateDate> <dc:title>Temperature forecast for Galway, Ireland</dc:title> <dc:creator>http://sw-app.org/mic.xhtml#i</dc:creator> <xmpMM:DocumentID>uuid:80f41db9-628f-48aa-9b7a-b7f5c2629304</xmpMM:DocumentID> </rdf:Description> </rdf:RDF> </x:xmpmeta>
gtd-1-xmp.pdf
Description: gtd-1-xmp.pdf
