Nature.com Core Ontology PDS4 Information Model Classes Source
http://ontology.pds.nasa.gov/pds/0001_nasa_pds_1/pds/tndo_supplemental/pds/collection http://ns.nature.com/terms/Collection LOOM
http://ontology.pds.nasa.gov/pds/0001_nasa_pds_1/pds/tndo_supplemental/pds/collection http://www.w3.org/2004/02/skos/core#Collection LOOM
http://ontology.pds.nasa.gov/pds/0001_nasa_pds_1/pds/tndo_supplemental/pds/document http://ns.nature.com/terms/Document LOOM