International Journal of Recent Technology and Engineering (IJRTE)
Now-a-days, web pages provide a large amount of structured data, which is required by many advanced applications. This data can be searched through their Web query interfaces. The retrieved information is also called 'Deep or hidden data'. The deep data is enwrapped in web pages in the form of data records. These special web pages are generated dynamically and presented to users in the form of HTML documents along with other content. These web pages can be a virtual gold mine of information for business, if mined effectively. Web data extraction systems or web wrappers are software applications for the purpose of extracting information from web sources like web pages.