A @dfn{key sequence}, or @dfn{key} for short, is a sequence of one
or more input events that form a unit. Input events include
-characters, function keys, and mouse actions (@pxref{Input Events}).
+characters, function keys, mouse actions, or system events external to
+Emacs, such as @code{iconify-frame} (@pxref{Input Events}).
The Emacs Lisp representation for a key sequence is a string or
vector. Unless otherwise stated, any Emacs Lisp function that accepts
a key sequence as an argument can handle both representations.
constituent events; thus, @code{"\C-xl"} represents the key sequence
@kbd{C-x l}.
- Key sequences containing function keys, mouse button events, or
-non-@acronym{ASCII} characters such as @kbd{C-=} or @kbd{H-a} cannot be
-represented as strings; they have to be represented as vectors.
+ Key sequences containing function keys, mouse button events, system
+events, or non-@acronym{ASCII} characters such as @kbd{C-=} or
+@kbd{H-a} cannot be represented as strings; they have to be
+represented as vectors.
In the vector representation, each element of the vector represents
an input event, in its Lisp form. @xref{Input Events}. For example,
@node Inheritance and Keymaps
@section Inheritance and Keymaps
@cindex keymap inheritance
-@cindex inheriting a keymap's bindings
+@cindex inheritance, keymap
A keymap can inherit the bindings of another keymap, which we call the
@dfn{parent keymap}. Such a keymap looks like this: