MOF QVT Final Adopted Specification (OMG Document ptc/05-11-01), http://www.omg.org/docs/ptc/05-11-01.pdf
ikv MOF Guide, 2006
Object Constraint Language (OCL) Version 2.0 (OMG Document formal/06-05-01), http://www.omg.org/docs/formal/06-05-01.pdf
Meta Object Facility (MOF) 2.0 Core Specification (OMG Document ptc/04-10-15), http://www.omg.org/docs/ptc/04-10-15.pdf