The serializer now has support for DOM Level 3 serialization
      (LSSerializer)
      for an XML parser. These changes are seen in the new class
      
      org.apache.xml.serializer.DOM3Serializer 
      and the new package
      org.apache.xml.serializer.dom3
      as well as a new method,       
      asDOM3Serializer() on the older 
      
      org.apache.xml.serializer.Serializer interface.
      
      
      More details are in the javadoc of those classes and interfaces