A simple, light weight, database for configuration information.
Includes dbus communication for change events.
Unless shouted down, db root would be:
/mnt/us/extensions/system/registry
Will try to cook up a Lua binding for it (unless one already exists, I haven't gone looking yet).
http://freedesktop.org/wiki/Software/Elektra/
Which is what the lab126 kdb utility is linked against.
Not that anyone would want to go messing with the Kindle's configuration system.
ToDoList++