I think the problem you face is in your xml. The first attribute of the BIPublisher element must be the xml namespace which must match the target namespace outlined in the schema. During opar packaging you'll find that it extracts a schema to $TMP/BIPublisherReport.xsd_partner. Once it finds your report.xml it validates against this schema. To directly answer your question, the xmlns must be xmlns="http://www.oracle.com/DataCenter/BIPublisherReport". You can test the validation of your xml against the schema with Eclipse or because the xml and schema are so short you can use an online validation tool.