psfontmgr accepts postscript, type1 and xfont categories.
psfontmgr provides x-postscript categories.

1. psprint, pspreview and postscript

psprint and pspreview categories are obsoleted from psfontmgr 0.4.9.
Postscript-previewer applications and Postscript-printer applications
should now provide postscript category with an application specific tag
is added, like <gs>/Courier-Bold.

To keep backward compatibility, pspreview category is accepted. 
psfontmgr registers fonts in this category to postscript category.

2. truetype

This category is obsoleted.
psfontmgr now deals with XLFDs of truetype fonts provided by x-ttcidfont-conf
as xfont category.

3. xfont

This category exists for providing x-postscript category, and is supposed
to be provided by x-ttcidfont-conf. 
It contains XLFDs of truetype and cid fonts with their hints including
how they look.

4. type1

These categories only exist for x-postscript category.
Fonts in these categories should have 'X-FontName' hint(s),
which represents the XLFD of the font, if exists.

Defoma-configuration script of psfontmgr will register PostScript fonts
with '<X>/' added as prefix, to x-postscript category with the
substitutive XLFD as the hint.

You can get PostScript fonts and their substitutive XLFDs with
following perl codes.

@psfonts = defoma_font_get_fonts('x-postscript');
foreach $psfont (@psfonts) {
  my @hints = defoma_font_get_hints('x-postscript', $psfont);
  
  $xfont = $hints[0];
  $psfont =~ s/^\<X\>\///;
  ...
}