27. The computer-readable storage medium of claim 18 , further comprising program code for defining a search result filter specifying restrictions for displaying search results, the restrictions based on at least one of query syntax, type of article displayed, Uniform Resource Locator, web site from which an article was retrieved, date on which an article was cached and a user-defined relevance metric.
27. The computer-readable storage medium of claim 18 , further comprising program code for defining a search result filter specifying restrictions for displaying search results, the restrictions based on at least one of query syntax, type of article displayed, Uniform Resource Locator, web site from which an article was retrieved, date on which an article was cached and a user-defined relevance metric. 28. The computer-readable storage medium of claim 27 , wherein the program code for updating the display of search results responsive to receiving the plurality of search results further comprises program code for filtering the display of search results based on the search result filter.