13. The method of claim 1 , all the limitations of which are incorporated herein by reference, further comprising applying user defined ranges as grouping ranges and tagging said data attribute as a grouping attribute when said user defined ranges are available for said data attribute.
13. The method of claim 1 , all the limitations of which are incorporated herein by reference, further comprising applying user defined ranges as grouping ranges and tagging said data attribute as a grouping attribute when said user defined ranges are available for said data attribute. 14. The method of claim 13 , all the limitations of which are incorporated herein by reference, further comprising determining appropriate grouping ranges based on a distribution of said data attribute.