1. A method comprising: converting physical aspects of a common warehouse model (CWM) to corresponding database management system (DBMS) items in a relational database by processing in a hierarchical manner the physical aspects and creating the corresponding DBMS items, the physical aspects comprising relational catalogs, the relational catalogs comprising relational schemas, the corresponding DBMS items comprising DBMS catalogs, the DBMS catalogs comprising DBMS schemas, wherein converting comprises the operations of: (a) scanning through the relational catalogs; (b) for a first of the relational catalogs, creating a corresponding first DBMS catalog in the relational database; (c) for each of the relational schemas in the first relational catalog, creating a corresponding DBMS schema in the corresponding DBMS catalog to hold corresponding information; and (d) processing each of the relational schemas to produce corresponding information for the corresponding DBMS schema.