EJB 3.0 vs old version EJB

Hi all,
EJB 3.0 is getting popular because of the Dependency Injection which greatly reduce the usage of XML.
Therefore, I have a question here.
In Ejb 3.0, how many XML will we apply?
1. Session Bean - ?
2. Entity Bean - ?
3. Message Driven Bean - ?
As my practice now,
Session Bean i don't use any XML and it works.
For entity Bean, I failed to do so ( that's why i suspect persistence XML might needed here, but where to place it?)
- Problem is at below screen.
09:24:53,843 ERROR [URLDeploymentScanner] Incomplete Deployment listing:
--- MBeans waiting for other MBeans ---
ObjectName: jboss.j2ee:jar=EjbCalculator.jar,name=daoCalculatorBean,service=EJB3
State: NOTYETINSTALLED
I Depend On:
    persistence.units:unitName=resource/conJava
ObjectName: jboss.j2ee:ear=Calculator.ear,jar=EjbCalculator.jar,name=daoCalculatorBean,service=EJB3
State: NOTYETINSTALLED
I Depend On:
    persistence.units:unitName=resource/conJava
--- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM ---
ObjectName: persistence.units:unitName=resource/conJava
State: NOTYETINSTALLED
Depends On Me:
    jboss.j2ee:jar=EjbCalculator.jar,name=daoCalculatorBean,service=EJB3
    jboss.j2ee:ear=Calculator.ear,jar=EjbCalculator.jar,name=daoCalculatorBean,service=EJB3Haven't try for Message Driven Bean (Hope to get info from your all =P )
Please kindly share your experience here. =)

Can anyone kindly advice??

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</resource-description>
</reference-descriptor>
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at weblogic.descriptor.internal.MarshallerFactory$1.evaluateResults(MarshallerFactory.java:221)
at weblogic.descriptor.internal.MarshallerFactory$1.createDescriptor(MarshallerFactory.java:146)
at weblogic.descriptor.BasicDescriptorManager.createDescriptor(BasicDescriptorManager.java:306)
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Truncated. see log file for complete stacktrace
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Those tags just declare that you are using our CMP provider and that
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-- Rob
Gen wrote:
I am using xdoclets to generate descriptor file weblogic-ejb-jar.xml
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My question is, are the extra tags below harmless, or should I
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Thanks.
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<type-version>6.0</type-version>
<type-storage>META-INF/weblogic-cmp-rdbms-jar.xml</type-storage>
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<type-version>6.0</type-version>
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----------- EXTRA TAGS GENERATED END ---------
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----------- TAGS I PUT IN JAVA CLASS END --------

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