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, see User-Level Insertion Commands. 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.)
Minor modes may bind commands to key sequences consisting of C-c followed by a punctuation character. However, sequences consisting of C-c followed by one of {}<>:;, or a control character or digit, are reserved for major modes. Also, C-c letter is reserved for users. See Key Binding Conventions.