9. The method of claim 1 , wherein the function is a product of two factors selected from the group consisting of the determined query-independent score, the determined content change frequency of the corresponding document, and the age of the corresponding document.
9. The method of claim 1 , wherein the function is a product of two factors selected from the group consisting of the determined query-independent score, the determined content change frequency of the corresponding document, and the age of the corresponding document. 10. The method of claim 9 , wherein a factor is raised to a power.