how to configure xdg-open applications?

[Paul Johnson]

I want to change the programs that xdg-open points to for things like
pdf or dvi.  There are no configure tools I can find on the
freedesktop site and the xdg-open man page gives no help at all. In
/etc/xdg I don't see settings for evince or such.  "grep -r pdf *" in
the /etc/xdg directory returns nothing.

Throw me some help, please.

-- 
Paul E. Johnson
Professor, Political Science
1541 Lilac Lane, Room 504
University of Kansas