window_type::
Compare the window type (_NET_WM_WINDOW_TYPE). Possible values are
+normal+, +dialog+, +utility+, +toolbar+, +splash+, +menu+, +dropdown_menu+,
- +popup_menu+ and +tooltip+.
+ +popup_menu+, +tooltip+ and +notification+.
id::
Compares the X11 window ID, which you can get via +xwininfo+ for example.
title::