For wafer representation, the Profile Interchange Format PIF [Duv88] [FFS91] and the Technology Interchange Format (TIF) [Tec95] are the most commonly used within VISTA/SFC.
The PIF format is considered the native data format of the framework; built in pre-processors and post-processors for geometry editing and viewing of grids and distributed quantities are provided [Rie96] [Ins96c], and VLISP function calls are available to write and read data in PIF format.