MIL-STD-2301, DEPARTMENT OF DEFENSE INTERFACE STANDARD: COMPUTER GRAPHICS METAFILE (CGM) IMPLEMENTATION STANDARD FOR THE NATIONAL IMAGERY TRANSMISSION FORMAT STANDARD (18 JUN 1993) [NO S/S DOCUMENT]., This standard establishes the requirements necessary to implement Computer Graphics Metafiles (CGM) used for the representation of symbol graphics in the National Imagery Transmission Format Standard (NITFS).