18. The method of claim 17 , further comprising, upon receiving a document request in step (e), the steps of: determining search keywords for said search; retrieving a relevant keyword list; associating said search keywords with said document; merging said search keywords thus associated into said relevant keyword list, resulting in an updated relevant keyword list; and saving said updated relevant keyword list.
18. The method of claim 17 , further comprising, upon receiving a document request in step (e), the steps of: determining search keywords for said search; retrieving a relevant keyword list; associating said search keywords with said document; merging said search keywords thus associated into said relevant keyword list, resulting in an updated relevant keyword list; and saving said updated relevant keyword list. 19. The method of claim 18 , further comprising, upon receiving a document request in step (e), the step of updating said popularity value for said document.