21. The method of claim 17 wherein the performing comprises performing main topics detection on the text content of each member of the set of sites.
17. A method of analyzing electronic documents in an intranet, wherein the intranet comprises a plurality of web sites, the method comprising: crawling HTML content and text content in a set of the sites, wherein the crawling comprises writing each crawled content to a file-based storage system, annotating each crawled content, and generating a first 4-tuple entry for each annotated, crawled content; deep-scanning non-HTML content and non-text content in the set of sites, wherein the deep-scanning comprises fetching all static non-HTML content and non-text content in the set of sites and generating a second 4-tuple entry; reverse-scanning the set of sites; performing a semantic analysis of the crawled content and the deep-scanned content by using the first 4-tuple entry and the second 4-tuple entry; correlating the results of the semantic analysis with the results of the reverse-scanning; comparing user navigation patterns and content from members of the set of sites; and combining the results of the performing, the results of the correlating, and the results of the comparing.