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23.3.2 Keymaps and Minor Modes

Each minor mode can have its own keymap, which is active when the mode is enabled. To set up a keymap for a minor mode, add an element to the alist minor-mode-map-alist. See Definition of minor-mode-map-alist.

One use of minor mode keymaps is to modify the behavior of certain self-inserting characters so that they do something else as well as self-insert. (Another way to customize self-insert-command is through post-self-insert-hook. Apart from this, the facilities for customizing self-insert-command are limited to special cases, designed for abbrevs and Auto Fill mode. Do not try substituting your own definition of self-insert-command for the standard one. The editor command loop handles this function specially.)

The key sequences bound in a minor mode should consist of C-c followed by one of .,/?`'"[]\|~!#$%^&*()-_+=. (The other punctuation characters are reserved for major modes.)