23. The method of claim 22 wherein the resource transition probabilities define a probability that, within a session, a second resource will be referenced, after a first resource has been referenced.
24. The method of claim 23 wherein the probability is defined by: a) counting a number of times the second resources is referenced after the first resource has been referenced to generate a first count; b) counting a number of times the first resource has been referenced to generate a second count; and c) dividing the first count by the second count.