§Addressed by several areas in the Revit 2012 API
§Construction modelling
§Grouping via assemblies
§Splitting via element parts
§Split face data is now accessible
§Face HasRegions property and GetRegions method
§FaceSplitter class accesses elements produced by Split Face operation
§Compound structure provides read/write access to layers
§Limited access in Revit 2011, no write or creation
access at all