Whenever I try to get an EntityManagerFactory from an app, I get seemingly contradictory parse errors:

javax.persistence.PersistenceException: Invalid persistence.xml.
Error parsing XML (line-1 : column -1): cvc-complex-type.3.2.2: Attribute 'version' is not allowed to appear in element 'persistence'.
Error parsing XML (line-1 : column -1): cvc-complex-type.4: Attribute 'version' must appear on element 'persistence'.
Error parsing XML (line-1 : column -1): cvc-complex-type.3.2.2: Attribute 'name' is not allowed to appear in element 'persistence-unit'.
Error parsing XML (line-1 : column -1): cvc-complex-type.4: Attribute 'name' must appear on element 'persistence-unit'.
....
the persistence.xml file has been stripped back to:

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
version="1.0">
<persistence-unit name="proxy_test">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.show_sql" value="true"/>
</properties>
</persistence-unit>
</persistence>
....
the callstack at this point is:
at org.hibernate.ejb.packaging.PersistenceXmlLoader.loadURL(PersistenceXmlLoader.java:145)
at org.hibernate.ejb.packaging.PersistenceXmlLoader.deploy(PersistenceXmlLoader.java:168)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:314)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
at com.authentipay.mps.db.test.HibernateTest.main(HibernateTest.java:20)

I'm using 3.6.2 final, but have also tried various flavours of 3.5.

This perhaps looks like a namespace issue, but I have scavenged persistence.xml namespace declarations from all over the web, none of them have helped. If I break the persistence.xml in other ways then the logging changes, so I'm sure it's finding this xml file.

My (eclipse) project references both hibernate3.jar and hibernate-jpa-2.0-api-1.0.0.Final.jar on the bulid path, from hibernate-distribution-3.6.2.Final.

Any help would be hugely appreciated. Thanks,
Phil

For anyone interested, this problem went away when I removed a bunch of jar files I was using for apache axis (not axis2). Perhaps some other parser from there was getting used.