7. The system according to claim 1 , wherein the first selecting means for enabling the user to select a graphical and/or textual information which represents two or more data which are represented to said graphical and/or textual information and wherein the first generating means for generating generate first data for at least some or all of said data which are represented by said graphical and/or textual information.
8. The system according to claim 7 , wherein the first data are grouped according to a first criterion and wherein the changing means are adapted for changing said first criterion to said at least one second criterion for each of said first data upon activation by said triggering means.