KeyBindings

Cocoa's default key bindings are here: %%BEGINCODESTYLE%% file:///System/Library/Frameworks/AppKit.framework/Resources/StandardKeyBinding.dict %%ENDCODESTYLE%%

The file %%BEGINCODESTYLE%%~/Library/KeyBindings/DefaultKeyBinding.dict%%ENDCODESTYLE%% allows you to override the defaults.

Here's Apple's documentation on this topic: http://developer.apple.com/documentation/Cocoa/Conceptual/BasicEventHandling/Tasks/TextDefaultsAndBindings.html

Here's everything I've figured out about the file format so far: Syntax notes:

    Modifiers:
        ^ : Ctrl
        $ : Shift
        ~ : Option (Alt)
        @ : Command (Apple)
        # : Numeric Keypad
       
    Keycode formats:
        \NNN   = Octal
        \UXXXX = Hex
           
    Printing characters (including space) can be specified by 
        using the character itself.
           
    Keycodes for non-printing keys:
        These are equal to the ASCII codes:

        Backspace:  \U0008
        Tab:        \U0009
        Escape:     \U001B
        Enter:      \U000A (newline) or \U000D (cr)?

        Other non-printing keys are represented by "unicodes" 0xF700-0xF8FF.  The
        complete list can be found in the NSEvent.h header file.  The availability of 
        various keys will be system-dependent.

        Up Arrow:   \UF700
        Down Arrow: \UF701
        Left Arrow: \UF702
        Right Arrow:\UF703

        F1:         \UF704
        F2:         \UF705
        F3:         \UF706
        ...
        F12:        \UF70F
        ...
        F35:        \UF726

        Insert:     \UF727
        Delete:     \UF728  (also ASCII code \177)
        Home:       \UF729
        End:        \UF72B
        Page Up:    \UF72C
        Page Down:  \UF72D

        Print Screen: \UF72E
        Scroll Lock:  \UF72F
        Pause:        \UF730
        SysReq:       \UF731
        Break:        \UF732

        Menu:         \UF735
        Help:         \UF746

    Sub-structure syntax:
        Nested dictionary (for multi-key bindings like ^X^S):  
            { key1 = val1; key2 = val2; ... }
        Nested array (for binding to a sequence of commands (??)):
            ( elt1, elt2, ... )

    The commands (like "pageUp:" and "moveToEndOfLine:") are Action methods
    of the NSResponder class.

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You can enter the code for any key by pressing Ctrl-q first. For example to set a keybinding for F1 you would hit Ctrl-q, then type F1 to insert the squiggley symbol that corresponds to the Unicode value for F1 into your keybindings file.

You can bind any standard NSResponder message and expect it to work. selectLine: and selectWord: are quite useful...