This standard defines a machine readable input format for Computer Numerical Control (CNC) drilling and routing machine tools related to the printed wiring board industry.

The format may be used directly to transfer drilling and routing information between printed board designers, manufacturers and users or as the output CNC standard from converters that expand higher level design input such as IPC-D-350 data.

This standard is intended to provide a common command structure that can assist in the board manufacturing process and is not intended to provide for every possible software enhancement.