1. OMG: Request For Proposal: MOF 2.0/QVT. OMG Document ad/2002-04-10, http://www.omg.org/cgi-bin/doc?ad/2002-04-10
2. Bettin, J.: Ideas for a Concrete Visual Syntax for Model-to-Model Transformations. In: Proceedings of the 18th International Conference, OOPSLA 2003, Workshop on Generative Techniques in the context of Model Driven Architecture, Anaheim, California, USA (October 2003)
3. QVT-Merge Group. MOF 2.0 Query/Views/Transformations RFP, Revised submission, version 1.0. OMG Document ad/2004-04-01, http://www.omg.org/cgi-bin/doc?ad/2004-04-01
4. Compuware, SUN. MOF 2.0 Query/Views/Transformations RFP, Revised Submission. OMG Document ad/2003-08-07, http://www.omg.org/cgi-bin/doc?ad/2003-08-07
5. Interactive Objects Software GmbH, Project Technology, Inc. MOF 2.0 Query/Views/Transformations RFP, Revised Submission. OMG Document ad/2003-08-11, http://www.omg.org/cgi-bin/doc?ad/2003-08-11