Duvida EJB..sobre arquivo xml ..?

<!--                                                                       -->
<!--  JBoss Server Configuration                                           -->
<!--                                                                       -->
<!-- ===================================================================== -->

<!-- $Id: oracle-ds.xml 63175 2007-05-21 16:26:06Z rrajesh $ -->
<!-- ==================================================================== -->
<!--  Datasource config for Oracle originally from Steven Coy             -->
<!-- ==================================================================== -->


<datasources>
  <local-tx-datasource>
    <jndi-name>OracleDS</jndi-name>
    <connection-url>jdbc:oracle:thin:@youroraclehost:1521:yoursid</connection-url>
	<!--

		Here are a couple of the possible OCI configurations.
		For more information, see http://otn.oracle.com/docs/products/oracle9i/doc_library/release2/java.920/a96654/toc.htm

	<connection-url>jdbc:oracle:oci:@youroracle-tns-name</connection-url>
		or
	<connection-url>jdbc:oracle:oci:@(description=(address=(host=youroraclehost)(protocol=tcp)(port=1521))(connect_data=(SERVICE_NAME=yourservicename)))</connection-url>

		Clearly, its better to have TNS set up properly.
	 -->
    <driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
    <user-name>x</user-name>
    <password>y</password>
    <!-- Uses the pingDatabase method to check a connection is still valid before handing it out from the pool -->
    <!--valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker</valid-connection-checker-class-name-->
    <!-- Checks the Oracle error codes and messages for fatal errors -->
    <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name>
        <!-- sql to call when connection is created
        <new-connection-sql>some arbitrary sql</new-connection-sql>
        -->

        <!-- sql to call on an existing pooled connection when it is obtained from pool - the OracleValidConnectionChecker is prefered
        <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
        -->

      <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml -->
      <metadata>
         <type-mapping>Oracle9i</type-mapping>
      </metadata>
  </local-tx-datasource>

</datasources>

2008-09-10 15:42:14,109 DEBUG [org.jboss.util.NestedThrowable] org.jboss.util.NestedThrowable.detectDuplicateNesting=true
2008-09-10 15:42:14,109 DEBUG [org.jboss.ejb.plugins.cmp.jdbc.metadata.MetaDataLibrary] Starting failed jboss.jdbc:service=metadata
org.jboss.deployment.DeploymentException: Invalid XML: file=file:/C:/jboss-4.2.2.GA/server/default/conf/standardjbosscmp-jdbc.xml@2:24; - nested throwable: (org.xml.sax.SAXParseException: The markup in the document following the root element must be well-formed.)
	at org.jboss.metadata.XmlFileLoader.getDocument(XmlFileLoader.java:342)
	at org.jboss.metadata.XmlFileLoader.getDocument(XmlFileLoader.java:272)
	at org.jboss.metadata.XmlFileLoader.getDocumentFromURL(XmlFileLoader.java:244)
	at org.jboss.metadata.XmlFileLoader.getDocument(XmlFileLoader.java:228)
	at org.jboss.ejb.plugins.cmp.jdbc.metadata.MetaDataLibrary.startService(MetaDataLibrary.java:79)
	at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
	at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
	at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
	at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)

<!-- $Id: standardjbosscmp-jdbc.xml 63355 2007-06-05 17:25:20Z rrajesh $ -->

<!-- Inicio Novo -->
<jbosscmp-jdbc>
   <defaults>
      <datasource>java:/OracleDS</datasource>
      <!--datasource-mapping>Oracle10g</datasource-mapping-->
   </defaults>
</jbosscmp-jdbc> 
<!-- Fim  Novo -->
<jbosscmp-jdbc>

   <defaults>
      <datasource>java:/DefaultDS</datasource>
      <!-- optional since 4.0 <datasource-mapping>Hypersonic SQL</datasource-mapping> -->
      <create-table>true</create-table>
      <remove-table>false</remove-table>
      <read-only>false</read-only>
      <read-time-out>300000</read-time-out>
      <row-locking>false</row-locking>
      <pk-constraint>true</pk-constraint>
      <fk-constraint>false</fk-constraint>
      <preferred-relation-mapping>foreign-key</preferred-relation-mapping>
      <read-ahead>
         <strategy>on-load</strategy>
         <page-size>1000</page-size>
         <eager-load-group>*</eager-load-group>
      </read-ahead>
      <list-cache-max>1000</list-cache-max>
      <clean-read-ahead-on-load>false</clean-read-ahead-on-load>
      <unknown-pk>
         <key-generator-factory>UUIDKeyGeneratorFactory</key-generator-factory>
         <unknown-pk-class>java.lang.String</unknown-pk-class>
         <jdbc-type>VARCHAR</jdbc-type>
         <sql-type>VARCHAR(32)</sql-type>
      </unknown-pk>
      <entity-command name="default"/>
      <ql-compiler>org.jboss.ejb.plugins.cmp.jdbc.JDBCEJBQLCompiler</ql-compiler>
      <throw-runtime-exceptions>false</throw-runtime-exceptions>
   </defaults>
</jbosscmp-jdbc>