Web search engines retrieved the large amount of data that is stored in the web database. Internet is the best way to access the data across the world and it present information in user friendly manner. Search engines are designed to retrieved information matching with the user query. When query is submitted web pages are retrieved. Web pages may contain several results set (SRRs). SRR is the collection of data units that represent the real world entity. Now-a-days there is a high demand for extracting and assigning a meaningful label to data units. Many applications like ecommerce and digital libraries required such a system. Therefore an automatic annotation system is used that extracted out data units and aligned them into groups and ensured that each data unit under a group has same semantic with the other data units of the same group. This automatic annotation approach is highly effective and resolves the problem of scalability.

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Data Unit Level Annotation Web Database.