Though a latecomer in the Internet family, the World Wide Web WWW or the Web has rapidly gained popularity and become the second most widely used application of the Internet [1]. The publicity WWW has gained is so great that many people naively equate WWW with the Internet. The friendly user interface and the hypermedia features of WWW have been attracting a significant number of users as well as information providers. As a result, the web has become a sea of all kinds of data, making any query into the huge information reservoir extremely difficult.

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