http://ns.adobe.com/iX/1.0/
http://ns.adobe.com/pdf/1.3/
http://ns.adobe.com/photoshop/1.0/
http://ns.adobe.com/xap/1.0/
http://ns.adobe.com/xap/1.0/mm/
http://purl.org/dc/elements/1.1/
http://www.apple.com/DTDs/PropertyList-1.0.dtd
http://www.w3.org/1999/02/22-rdf-syntax-ns#