The relational persistence framework of the AS Java is called Open SQL for Java. It is a part of a comprehensive infrastructure that is designed to provide persistency for application development inside the AS Java. Among the key features of the framework are:
Database independence
Efficiency
Maintainability
Orientation to standards
Close integration into the AS Java
Enhanced performance by table buffers and statement pooling
More information:
The Open SQL for Java offers the Open SQL/JDBC programming model, which enables support for the JDBC standard used for dynamic queries to the database.
More information: Using Open SQL/JDBC in the Persistence Layer