Paolo Atzeni Giorgio Gianforme Paolo Cappellari A Universal Metamodel and Its Dictionary. 38-62 2009 1 T. Large-Scale Data- and Knowledge-Centered Systems http://dx.doi.org/10.1007/978-3-642-03722-1_2 journals/tlsdkcs/2009-1 db/journals/tlsdkcs/tlsdkcs1.html#AtzeniGC09