- Global xkb_keycode_t
- Explain how keycodes are mapped to scancodes.
- Global xkb_layout_index_t
- Explain what are layouts.
- Global xkb_led_index_t
- Explain what are LEDs.
- Global xkb_level_index_t
- Explain what are shift levels.
- Global xkb_mod_index_t
- Explain what are modifiers.