1. A graphical user interface, comprising a presentation area the presentation area including a reference area that is representative of a reference data object, at least two classification belts including a first and a second classification belt, the first and the second classification belt at least partly surrounding the reference area in a concentric arrangement and the first classification belt being arranged at a smaller distance to the reference area than the second classification belt, and at least one task area that is representative of a task data object, the task data object and the reference data object being linked to each other and having a known relation that is represented by at least one rating data entry, wherein each of the at least two classification belts represents a rating class of possible rating data entries and wherein the task area is located in the classification belt, the rating class of which comprises the rating data entry of the task data object represented by the task area.