StartDocument( documentVersion="1.0" )
Comment( text=" Attribute uniqueness: repeated identical attribute " )
StartElement( name="foo" qualifiedName="foo"
    NamespaceDeclaration( prefix="a" namespaceUri="http://example.org/~wilbur" )

    NamespaceDeclaration( prefix="b" namespaceUri="http://example.org/~wilbur" )
 )
Characters( whitespace text="

" )
Invalid( name="bar" qualifiedName="bar"
    Attribute( name="attr" namespaceUri="http://example.org/~wilbur" qualifiedName="a:attr" prefix="a" value="1" )

    Attribute( name="attr" namespaceUri="http://example.org/~wilbur" qualifiedName="a:attr" prefix="a" value="2" )
 )
ERROR: Attribute redefined.