The arrival of World Wide Web (WWW) has brought in huge amount of data which keeps growing dynamically. This necessitates the requirement of new tools and processes that can intelligently and automatically transform data into useful information and knowledge, especially such knowledge, which is subtle and hidden in the data. Knowledge Discovery is such a process. Knowledge discovery takes the form of Web mining for extracting useful and meaningful information from the Web. Web Mining revolves around automatic discovery and extraction of useful information from World Wide Web documents and...