The University Data Warehouse (UDW) is the central authoritative data source for the University. It provides support for reporting, ad hoc data queries, and analytics. The University Data Warehouse is an Oracle-based database that is comprised of data originating in several University systems, including PeopleSoft, PRISM, and Courseweb. The data is extracted from those systems, optimized for speed and ease of use, and placed into data marts. A data mart is a subset of the University Data Warehouse, and is oriented toward a particular type of data or function.