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Getting Started : Using the Drivers : Connecting Using Data Sources : How Data Sources Are Implemented
  
How Data Sources Are Implemented
Each driver has a data source class. See the appropriate driver chapter for the name of the data source class associated with each driver.
Each data source class implements the following JDBC interfaces:
*javax.sql.DataSource.
*javax.sql.ConnectionPoolDataSource allows applications to use connection pooling.
*javax.sql.XADataSource allows applications to use distributed transactions through the Java Transaction API (JTA).
Note: JTA is only supported by the DB2, Informix, Oracle, OpenEdge, SQL Server, and Sybase drivers.