Sav ZBase is a Java-coded ORDBMS featured by Zigzag language - more expressive than SQL. The some peculiarities of database: many-valued data, multi-level classification, class inheritance, dynamic structure, and automatic data integrity control. Product consists of the next tools: • ZInterpreter. A development tool for Zigzag language programming of a database. Helps to edit and debug a Zigzag script. • ZNavigator. Allows generating virtual tables via attribute names and values.