Now-a-days, organizations use many more databases for their day-to-day operations. These tremendous amounts of databases have been accessed on the web in HTML form. When a query is submitted to the search interface these web pages are retrieved. The data units extracted from the stored database are merged into the pages dynamically and results are shown on the webpages. So for this annotation approach is used. In this it first aligns the data units into different groups in a way that data in the same group have the same meaning. Annotation label is assigned to each group on the basis of different annotators.