This part of ISO/IEC 7942 provides a file format and encodings for the storage and retrieval of GKS-94 picture parts. It is based on Part 2 of ISO/IEC 7942, the NDC metafile, which is itself an extension of the Computer Graphics Metafile, Version 4 defined by ISO/IEC 8632:1992/Amd.2: 1995 (all parts).