It is disclosed to determine, in a second process of compiling data that yields a second compiled database, whether a first compiled database, which is yield from a first process of compiling data performed before the second process of compiling data, contains first object data defining a first object that is considered at least similar to a second object; and to include, in the second process of compiling data, second object data defining the second object into the second compiled database, if it is determined that first object data defining a first object that is considered at least similar to the second object is not contained in the first compiled database, and including the first object data defining the first object into the second compiled database otherwise. Further disclosed are corresponding apparatuses, a corresponding system and a corresponding computer program code.