Solution:

With the help of the Java technology (JBoss & Hibernate), standard modules (eg user / rights management) as well as free customizable user interfaces can be quickly ported from legacy databases with  4DBM, with little effort and future-proof.

Procedure:
1.) Analysis / decomposition of the legacy system and 2) Copy the legacy database
3.) Porting and 4) revision of the database structure
5.) user interface design and realization of the business logic
6.) date of import of the legacy database and switching to the target system