||Location of a trackable, defined by x, y and z coordinates.
||The monitor reports to the TriggerAgent when the position information
of any registered trackable changed.
||Movement of a trackable, defined
by a direction (measured in degrees), velocity and acceleration.
||This class represents the orientation of a trackable.
||This class represents a trackable user, device or physical object.
||A trigger is a combination of a spatial conditions and a action that
will be triggered if the spatial conditions are fulfilled.
||An application registers an action, which is supposed to be
triggered under a certain condition at the trigger agent.