From the header comments of TikZ-UML (obtained from http://www.ensta-paristech.fr/~kielbasi/tikzuml/index.php): % Some macros for UML Diagrams. % Home page of project: % Author: Nicolas Kielbasiewicz % Style from: % Fixed by Nicolas Kielbasiewicz (nicolas.kielbasiewicz@ensta-paristech.fr) in dec 2010 to compile with pgf 2.00