Keith Duddy Anna Gerber Michael Lawley Kerry Raymond Jim Steel Model Transformation: A declarative, reusable patterns approach. 174-185 2003 conf/edoc/2003 EDOC http://csdl.computer.org/comp/proceedings/edoc/2003/1994/00/19940174abs.htm db/conf/edoc/edoc2003.html#DuddyGLRS03