The JDBC 2.0 Optional Package (formerly the JDBC 2.0 Standard Extension API) defined several features that JDBC 2.0 drivers could implement. jConnect version 6.05 and later have implemented the following optional package extension features:
JNDI for naming databases (works with any Sybase DBMS supported by jConnect)
Connection pooling (works with any Sybase DBMS supported by jConnect)
Distributed transaction management support works only with Adaptive Server.
Sybase recommends that you use JNDI 1.2, which is compatible with Java 1.1.6 and later.