JasperReports Server provides built-in support for many commonly used data sources, such as JDBC, JNDI, and JavaBeans, as described in the JasperReports Server Administrator Guide. However, JasperReports Server does not include all JasperReports Library data sources, and you may want to use a custom JasperReports Library data source. In either case, you can extend JasperReports Server to support additional data sources by adding files to your configuration.