Has the AutoCAD 2009 DWG drawing file format changed from the AutoCAD 2005/2006/2007/2008 products?
The AutoCAD 2009 DWG™ file format is the same DWG file format as in AutoCAD 2008. This AutoCAD 2009 DWG format is also the same DWG file format that is used in the latest releases of Autodesk ‘s industry-specific products such as AutoCAD® Architecture, AutoCAD® Map 3D, AutoCAD® Civil 3D® , AutoCAD® Electrical, and AutoCAD® Mechanical software applications. Nonetheless, you can still easily share files between design teams using any previous version of AutoCAD. As in the past, this new AutoCAD version opens DWG™ files from all earlier DWG versions of the software created by any Autodesk product.