The JRXMLUtils class should set namespaceAware(true) on the documentbuilderfactory.
When this class creates an instance of the JAXP documentbuilderfactory, it must check the jasper property "net.sf.jasperreports.xml.detect.namespaces" introduced in 4.01
If it is set to true, the namespace aware must be set to true
This is really needed since I want to use xml datasources with jasper reports AND Ireport . In jasper (command line) it works now fine using XAlan or Jaxen. With IReport however it does not, since the Document objects are constructed without namespace information, and there is no way to set in IReport that it must be like this.
IReport just passes the file url, and it is Jasper (JRXMLUtils) which constructs the DOM Object without namespace info.
=> Now I hotpatch the jasperreports-4.01.jar file inside IReport with my custom JRXmlUtils class (one line change)