FlexAB is a rapid application development suit for System Functional Analyst, based on a relational data base plus a set of COM functions. The result is a transparent data base system with the capability of managning complex Objects. Currently due to market competitiveness there is a need for fast development tool, entrusting data to robust and proven technologies. This is FlexAB goal. Within the structure of the FlexAB system relational databases for the storage of the information are used. But the important thing is that the structure of the tables and relations of these data bases are special, and fixed for all the applications.