code> has an <code>org.xml.sax.ErrorHandler</code> registered
 on it, it will be replaced by the Jakarta XML Binding Provider so that validation errors
 can be reported via the <code>ValidationEventHandler</code> mechanism of
 Jakarta XML Binding.  If the <code>SAXSource</code> does not contain an <code>XMLReader</code>,
 then the Jakarta XML Binding provider's default parser mechanism will be used.
 <p>
 This parser replacement mechanism can also be used to replace the Jakarta XML Binding
 provider's unmar