The database services use the JDBC 2.0 Optional Package API to connect
to the JDBC 2.0 DataSource object registered with the JNDI . The database
services request a connection to the DataSource specified by a definition.
This hides the specific JDBC calls and allows the service invoker to be independent
of the database connection implementation. The service invoker does not directly
talk with JDBC. Instead, it uses a simplified interface that also takes advantage
of other toolkit features. The application developer does not require explicit
knowledge of the JDBC API.