PDS4 Information Model Classes	Nature.com Core Ontology	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