MIL-STD-2301A, DEPARTMENT OF DEFENSE: INTERFACE STANDARD COMPUTER GRAPHICS METAFILE (CGM) IMPLEMENTATION STANDARD FOR THE NATIONAL IMAGERY TRANSMISSION FORMAT STANDARD (05 JUN 1998) [NO S/S DOCUMENT]., This standard establishes the requirements necessary to implement Computer GraphicsMetafiles (CGMs) used for the representation of symbol graphics in the National Imagery Transmission FormatStandard (NITFS).