1. A method for providing a logical representation of physical fields of physical data entities to facilitate querying the physical fields, the method comprising: providing a logical model to logically describe the physical fields, the logical model comprising logical fields corresponding to respective physical fields; and providing a runtime component configured to transform an abstract query into an executable query containing at least one combinatorial statement, the abstract query comprising a condition and at least two result fields selected from the logical fields of the logical model, each result field having executable counterparts in the combinatorial statement of the executable query.