Trizon Group, Belgrade, Serbia and Montenegro.

In the last decade data warehouses have become the basis for support in business decision making. This paper will show our framework for the data warehouse management system as well as advantages and disadvantages of this approach in relation to the other data warehouse management systems. Many approaches to the development of data warehouse emphasize the importance of meta data yet none of them sticks to that principle. The basic characteristic of our approach is that it is fully based on XML meta data. We have also implemented significant changes in dimensional model based upon flexible dimensional hierarchies which enabled us to use special methods of creating aggregations and important advantages in data visualization. What makes this approach different is the concept of intelligent creation of aggregates based on observation of history of users queries and the use of modified data mining algorithm APRIORI