期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2015
卷号：4
期号：6
页码：12754-12756
出版社：IJECS
摘要：Although internet seems to be the ocean of information which provides almost anything we want but abstracting the specified set ofhigh quality data from internet becomes impossible in 99% cases.In most of the cases the user has to get satisfied with the surface web whichconstitutes only 1% of the total data available. Many a times user gets information only from static sites while most of the data available on netare stored in dyanamically generated sites which stands in complete contrast with the static sites both qualitatively and quantitatively. To helpthe user overcome such difficulties “ THE HIDDEN WEB CRAWLERS”stands as a great source . The deep Web sources store their content insearchable databases that only produce results dynamically in response to a direct request in response to which a hidden web crawler startsthe process of making dozens of direct queries simultaneously , using multiple-thread technology and thus is capable of identifying, retrieving, ,classifying, and organizing "deep" content. This paper highlights the comparison between surface web and hidden web, basic workingprinciples, components, importance and future scope of this indespensible tool i.e Hidden Web Crawler
