27. The method of claim 19 further comprising the step of displaying a plot in an area bounded by first and second non-parallel axes where each selected pair is represented by a point having a first coordinate along the first axis and a second coordinate along the second axis.
28. The method of claim 27 further comprising the steps of: generating a second representation of each of said elements; for the selected pairs of documents, determining a second utility measure based on the respective second representation of the plurality of elements for the documents in that pair; and wherein in the displaying step, the plot is a scatter plot, the first coordinate is equal to the first utility measure and the second coordinate is equal to the second utility measure.