<oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> PhysicalObject Collection Dataset Event Image InteractiveResource Service Software Sound Text PhysicalObject </oai_dc:dc> isVersionOf: hasVersion: isReplacedBy: replaces: isRequiredBy: requires: isPartOf: hasPart: isReferencedBy: references: isFormatOf: hasFormat: conformsTo: application message video audio image model multipart text application/pdf video/quicktime video/quicktime image/jpeg image/jpeg image/jpeg image/gif text/plain text/html nsdl_dc:GEM Agriculture Biology Ecology Education (General) History of science Mathematics Natural history Paleontology Physics Astronomy Space sciences Technology