== modified keyboard layout for us
This keyboard file modifies the us keyboard file to give you an additional dvorak variant. This variant includes german umlauts with AltGr + A etc. Additionally there are parenthesises on AltGr + E and AltGr + H, as well as curly braces on AltGr + I and AltGr + D.
The interesting part in this file is the dvorak-de-pro variant. The file should go to /usr/share/X11/xkb/symbols but be careful when overwriting existing files. Once the file is there it can be loaded with
setxkbmap us dvorak-de-pro