buildingSMART has released the version 1.0 of mvdXML – the new schema and method to publish official subsets of IFC to satisfy well defined data exchange requirements.
Model View Definitions (MSG) have been the method to publish the IFC implementation requirements to satisfy data exchange requirements since a long time. The most well known buildingSMART MVD is the IFC2x3 Coordination View 2.0, currently open for certification. Read more on the IFC Dev Blog here
See http://www.buildingsmart-tech.org/specifications/mvd-overview for more information