("Outline" . "Text")
("\\(HT\\|SG\\|X\\|XHT\\)ML" . "SGML")
("log\\|diff\\|vc\\|cvs\\|Annotate" . "Version Control") ; "Change Management"?
+ ("Threads\\|Memory\\|Disassembly\\|Breakpoints\\|Frames\\|Locals\\|Registers\\|Inferior I/O\\|Debugger"
+ . "GDB")
("Lisp" . "Lisp")))
"How to group various major modes together in \\[mouse-buffer-menu].
Each element has the form (REGEXP . GROUPNAME).