Mapping algorithms

PSF uses different processes to map one technology to another; the process chosen depends on how the input font is specified:

• For coded font names, the mapping process consists of merely changing the prefix of the input font, X0 or X1–Xg, to another prefix, Xz; the rest of the name remains the same. This is called "prefix mapping."
• For fonts specified as GRIDs, PSF uses the mapping tables to find the corresponding code page and character set names.
• For fonts specified as pairs of code page and character set names, PSF uses the mapping tables to find another pair of code page and character set names or to verify that the original names are of the desired technology.