Download the Oslo May CTP to get updated "M" language, grammar, compiler, tool chain and "Quadrant" modeling tool. 

This CTP also includes domain model schemas for Unified Modeling Language (UML) 2.1.2 and Common Language Runtime (CLR) assemblies, along with their corresponding Oslo repository loader executables (LoadUml.exe and LoadAssembly.exe).

We invite you to play around with the bits and provide us your feedback!