The AMF filed format has been approved as an improvement over STL.
The American Society for Testing and Materials (ASTM) committee F42 has approved the AMF file format as a replacement for STL, the current standard format for 3D printing. The AMF format is designed to take better advantage of the advanced capabilities of modern 3D printers. Watch the interview by Leslie Langnau with Prof. Hod Lipson from Cornell University, the chairman of the committee, for more information about the new format.
via Make Parts Fast