SubjectPredicateObjectGraph
http://standards.iso.org/iso/19118/ed-1/en/
ISO 19118:2005 Exchange Metadata
http://standards.iso.org/iso/19118/ed-1/en/
http://standards.iso.org/iso/19118/ed-1/en/
http://standards.iso.org/iso/19118/ed-1/en/
http://standards.iso.org/iso/19118/ed-1/en/
http://standards.iso.org/iso/19118/ed-1/en/
http://standards.iso.org/iso/19118/ed-1/en/