I am using jdo and configuring the persistence manager with jdoconfig.xml
However everywhere I find documentation about jdoconfig.xml it states that http://java.sun.
The xmlns is not a real file/directory, more a namespace, so ought not exist! The version is appended to get the real XSD file, namely http://java.sun.com/xml/ns/jdo/jdoconfig_3_0.xsd
Maybe