File variables in tex-site.el

["Ulrich Dirr" <ud@art-satz.de>]

I'm wondering what all the file variables mean (%t, %f, %s, etc.).
I would like to customize the list shown below. Where can I find an
explanation what variables exist and what's their meaning?

;; The fpTeX commands.
(setq TeX-command-list
  (list (list "TeX" "tex \\nonstopmode\\input %t" 'TeX-run-TeX nil t)
 (list "LaTeX" "%l \\nonstopmode\\input{%t}" 'TeX-run-LaTeX nil t)
 (list "LaTeX PDF" "pdflatex \\nonstopmode\\input{%t}" 'TeX-run-LaTeX
nil t)
 (list "eLaTeX PDF" "pdfelatex \\nonstopmode\\input{%t}" 'TeX-run-LaTeX
nil t)
 (list "View" "%v" 'TeX-run-command t nil)
 (list "View PS" "gsview32 %f" 'TeX-run-command t nil)
 (list "View PDF" "start %s.pdf" 'TeX-run-command t nil)
 (list "Print" "dvips %d" 'TeX-run-command t nil)
 (list "File" "dvips %d -o %f " 'TeX-run-command t nil)
 (list "BibTeX" "bibtex %s" 'TeX-run-BibTeX nil nil)
 (list "Index" "makeindex %s" 'TeX-run-command nil t)
 (list "Check" "lacheck %s" 'TeX-run-compile nil t)
 (list "Spell" "<ignored>" 'TeX-run-ispell-on-document nil nil)
 (list "Makeinfo" "makeinfo %t" 'TeX-run-compile nil t)
 (list "AmSTeX" "amstex \\nonstopmode\\input{%t}" 'TeX-run-TeX nil t)
 (list "Other" "" 'TeX-run-command t t)))

Ulrich Dirr