I'm sure this is a pretty basic question but try 
  as I might I can't seem to get around it.
   
  
   
  "[Exception [EclipseLink-25008] (Eclipse 
  Persistence Services - 1.0 (Build 1.0 - 20080707)): 
  org.eclipse.persistence.exceptions.XMLMarshalException
Exception 
  Description: A descriptor with default root element 
  {urn:customer-example}customer was not found in the project]"
   
  1. I've created a JAR containing the sample 
  classes from the TopLink article.
2. I've walked thru all of the 
  EclipseLink steps in the article with no apparent difficulties
   
  My problem starts when I attempting to run the 
  test code from the article.
   
  The jar containing the sample classes is on the 
  classpath, as are the following from 
  EclipseLink:
eclipselink.jar
moxy/javax.activation_1.1.0.jar
moxy/javax.mail_1.4.0.jar
moxy/javax.xml.bind_2.0.0.jar
moxy/javax.xml.stream_1.0.0.jar
moxy/jaxb-impl.jar
moxy/jaxb-xjc.jar
   
  In addition, the 'classes' directory from the 
  EclipseLink sample project is on the classpath, containing the 
  following:
examples
CustomerProject.xml
examples.ox.model.Address.xml
examples.ox.model.Customer.xml
examples.ox.model.PhoneNumber.xml
sessions.xml
   
  The required jaxb.properties resides under the 
  'examples/ox/model' subdirectory above.
   
  Exception is being thrown at the following line 
  from the sample code:
Customer customer = (Customer) 
  unmarshaller.unmarshal(file);
   
  Any insight would be greatly 
  appreciated!
   
  Regards,
Bill
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