Binary Information Press
Data warehousing is the concept which appears frequently in data mining and data processing application. Data warehousing provides On-Line Analysis (OLAP) tool which is used in each kind of granularity multi-dimensional data analysis and is propitious to the efficiency of data mining. Usually data warehousing is modeled by using multidimensional database structure. The physical structure of data warehousing may be the storage of relation data or the multi-dimensional data cube. Data warehousing has introduced the concept hierarchy. The concept hierarchy accords with the theory of multi-granularity of quotient topology. The granularity theory is not only restricted to the granularity analysis of different levels, also may carry on the granularity analysis of the same level, thus it has the application prospect in data warehousing.