Key names

Many actions and resources include key names. A key name is the name of a key on the keyboard.

A key name can be specified in several ways:
 * The name printed on the key, if it is a single character, such as a.
 * An X11 keysym name.
 * An APL keysym name.
 * A Unicode character value, e.g., U+0061 for a.