ISO standard edition
['ISO/IEC 9973:1994: Information technology—Computer graphics and image processing—Procedures for registration of graphical items', 'ISO/IEC 9973:2006: Information technology—Computer graphics, image processing and environmental data representation—Procedures for registration of items', 'Information technology—Computer graphics and image processing—Procedures for registration of graphical items', 'ISO/IEC TR 9973:1988: Information processing—Procedures for registration of graphical items', 'ISO standard edition', '1994-12-22']