For the version before 7.0.0 there is a xsd at http://jasperreports.sourceforge.net/xsd/jasperreport.xsd .
Sadly, I cannot find a xsd for the 7.0.0 version. Even at the github page https://github.com/TIBCOSoftware/jasperreports no xsd is included.
Can anybody tell me, where to find the new version?