22. The method of claim 21 wherein associating each of said web pages with co-ordinate data comprises associating web pages with co-ordinate data on the basis of textual analysis of data appearing in a webpage.
21. The method of claim 19 wherein processing generated network data to determine for each of said web pages a value indicative of the extent to which a web page is associated with hyperlinks connecting other web pages which are otherwise poorly connected to each other comprises: associating each of said web pages with co-ordinate data; updating said co-ordinate data so as to cause the co-ordinate data of web pages connected by hyperlinks to identify co-ordinates closer together and to cause co-ordinate data of web pages which are not connected to each other to identify co-ordinates further apart; and calculating for each of said web pages a value indicative of the extent to which a web page is associated with links connecting web pages in different sets of web pages on the basis of the Cartesian lengths of the hyperlinks associated with the web page.