InterBase implements Multi-Version Concurrency Control (MVCC) and refers to it as Multi-Generational Architecture.
InterBase supports foreign keys and creates indices for foreign keys by default. Referential integrity is enforced for foreign keys.
InterBase is a relational database management system (RDBMS) and it complies with SQL-92 standard.
In index, data values are compressed via pre and postfix compression.
Embarcadero Technologies, Inc.
Groton Database Systems, Yaffil