This is the name of the Java class containing the JDBC driver. Each vendor's is different. You will need to consult the driver documentation for the actual class name. You must also ensure that this class is listed in your classpath environment variable. This is a property I have added that writes any errors to a log file and can be very useful in debugging.
Valid options are 'Y' or 'N'.
This is the name of the actual database to connect to, not the database instance name. This is a descriptive caption for the DataSource name as registered in the ODBC Control Panel Applet on machines running MS Windows. This is the corresponding database logon password for the associated userid above. For security reasons, you may wish to leave this blank. In the case of MS SQL Server, the default port is 1433.