<server>
  <featureManager>
    <feature>ejbPersistentTimer-3.2</feature>
    ... your other features
  </featureManager>

  <dataSource id="DefaultDataSource">
    <containerAuthData user="user1" password="pwd1"/>
    <jdbcDriver libraryRef="DerbyLib"/>
    <properties.derby.embedded createDatabase="create" databaseName="timerdb"/>
  </dataSource>
  <library id="DerbyLib">
    <fileset dir="C:/Drivers/derby" includes="derby.jar"/>
  </library>
</server>