Hi, I'm working fine with the following JavaBeanDataSource (listing, subreports, datasets etc..). The bean has the following structure: public class ReportDTO implements IReportDTO {private List<ReportGenericItem> body_1 = null;private List<ReportGenericItem> body_2 = null;..getters/setters} where public class ReportGenericItem { private String f_0; private String f_1; private String f_2;..getters/setters} Now, I'd like to group in a detail section by body_1.f_0 but I don't figure out how to do that. Thanks in advance for any help/suggestion!! Paolo
