23. The system of claim 12 , wherein the function is a product of the revision probability for the first query with respect to the indexed query and the query rank for the indexed query.
23. The system of claim 12 , wherein the function is a product of the revision probability for the first query with respect to the indexed query and the query rank for the indexed query. 32. The system of claim 23 , wherein the suggested revision is displayed to a user in a location dependent upon a relative strength of the confidence measure.