International Journal of Innovative Research in Science, Engineering and Technology (IJIRSET)
Data warehouses are most ordinarily employed in strategic decision making processes. These systems integrate heterogeneous causes which are not only restricted to their interior enterprise facts & figures but also encompass facts & figures from the WWW, the last mentioned of which have become increasingly more significant in the conclusion making method in recent years. This gives motivation to use XML extensively in implementation of data warehouses. XML facilitates data and metadata interchange in between multiple heterogeneous data sources from the web and the data ware houses.