47. The method of claim 45 wherein: (a) said first intermediate utility measure is a combination of a first similarity measure for said first document element, x, and said first similarity measure for said second document element Y; and (b) said second intermediate utility measure is a combination of said first similarity measure for said first document element, X, and said first similarity measure for said second document element, Y.
49. The method of claim 47 wherein said first similarity measure is a word weight vector.