Filtering on user-specified values can occur either at query run time, or after BIRT retrieves data from the data source. The filtering option available to a report depends on the data source. User filtering at query run time is supported for JDBC and XML data sources. If a report uses other types of data sources, you can define filters only after BIRT retrieves data from the data source. You define these filters at either the data set, table-element, or list-element level.