13. A method of categorizing a plurality of objects which together comprise an object set; said method comprising the steps of: a) storing a categorization value for an object in said object set; b) storing a global rating value for all objects in said object set; c) selectively recalculating said global rating value by employing an aggregation algorithm, said global rating value being a calculation of all categorization values in said object set, if at least one of a) said categorization value of any object in said object set is altered, b) at least one additional object is added to said object set, and c) at least one of said plurality of objects is deleted from said object set; d) identifying each object for which said categorization value is included in said global rating value, and e) tracking each object for which said categorization value is included in said global rating value such that said aggregation algorithm includes said categorization value of each object of said plurality of objects a predetermined number of times.
13. A method of categorizing a plurality of objects which together comprise an object set; said method comprising the steps of: a) storing a categorization value for an object in said object set; b) storing a global rating value for all objects in said object set; c) selectively recalculating said global rating value by employing an aggregation algorithm, said global rating value being a calculation of all categorization values in said object set, if at least one of a) said categorization value of any object in said object set is altered, b) at least one additional object is added to said object set, and c) at least one of said plurality of objects is deleted from said object set; d) identifying each object for which said categorization value is included in said global rating value, and e) tracking each object for which said categorization value is included in said global rating value such that said aggregation algorithm includes said categorization value of each object of said plurality of objects a predetermined number of times. 14. The method of categorizing said plurality of objects as recited in claim 13, wherein said identifying and tracking steps allow said aggregation algorithm to include once said rating of each object of said plurality of objects, thereby to avoid propagation of categorization values and to avoid over-counting of categorization values when said plurality of objects exhibit a looping characteristic.