7. The method of claim 1 wherein presenting representative queries further comprises: presenting one or more representative queries in order according to the ranks of their respective clusters, where the one or more representative queries are associated with a common representative category.
7. The method of claim 1 wherein presenting representative queries further comprises: presenting one or more representative queries in order according to the ranks of their respective clusters, where the one or more representative queries are associated with a common representative category. 8. The method of claim 7 wherein a total number of representative queries associated with the common representative category does not exceed a pre-determined threshold.