StartDocument( documentVersion="1.0" )
Comment( text=" Reserved prefixes and namespaces: using the xml prefix undeclared " )
StartElement( name="foo" qualifiedName="foo"
    Attribute( name="lang" namespaceUri="http://www.w3.org/XML/1998/namespace" qualifiedName="xml:lang" prefix="xml" value="en" )
 )
EndElement( name="foo" qualifiedName="foo" )
EndDocument( )