Intended to supplement IPC-D-350, specifically in the area of describing printed wiring board related drawings in digital form. It is intended that the basic record format described in IPC-D-350 also apply to the record format described in this supplement. These formats may be used for transfer of drawings between printed wiring board designers, manufacturers and customers. The intent is to convey additional requirements, guidelines and examples necessary to provide the data structures and concepts for drawing description in digital form.