22. The method of claim 19 , further comprising: (h) receiving by the search engine from the client application a request to obtain the second refined search results; (i) effecting by the search engine a second refined search in respect of a second refined search query including the at least one first search term and at least one second additional search term, the second refined search query yielding second refined search results; and (j) sending by the search engine to the client application the second refined search results and instructions for displaying at least one second refined search result and a visual representation of a refinement relationship between the first search query and the second refined search query.
22. The method of claim 19 , further comprising: (h) receiving by the search engine from the client application a request to obtain the second refined search results; (i) effecting by the search engine a second refined search in respect of a second refined search query including the at least one first search term and at least one second additional search term, the second refined search query yielding second refined search results; and (j) sending by the search engine to the client application the second refined search results and instructions for displaying at least one second refined search result and a visual representation of a refinement relationship between the first search query and the second refined search query. 27. The method of claim 22 , wherein the first refined search results are from a first database and the second refined search results are from a second database being different than the first database.