Steve Cook Anneke Kleppe Richard Mitchell Bernhard Rumpe Jos Warmer Alan Wills The Amsterdam Manifesto on OCL. 115-149 2002 conf/ocl/2002 Object Modeling with the OCL http://link.springer.de/link/service/series/0558/bibs/2263/22630115.htm db/conf/ocl/ocl2002.html#CookKMRWW02