22. The document clustering system of claim 19 , wherein the measure of similarities between the cluster summary and the feature vector is a measure of the information loss that would occur if the feature vector were added to the cluster summary.
22. The document clustering system of claim 19 , wherein the measure of similarities between the cluster summary and the feature vector is a measure of the information loss that would occur if the feature vector were added to the cluster summary. 23. The document clustering system of claim 22 , wherein the measure of similarities between the cluster summary and the feature vector is the weighted Jensen-Shannon divergence.