Autodesk 466B1-05A761-1304 - AutoCAD Inventor Simulation Suite 2010 Getting Started page 12

Drawing (.idw, .dwg) Files
After you create a model, you can create a drawing to document your design.
In a drawing, you place views of a model on one or more drawing sheets. Then
you add dimensions and other drawing annotations to document the model.
A drawing that documents an assembly can contain an automated parts list
and item balloons in addition to the required views.
The templates to use as the starting point for your drawings have the standard
drawing file extension (.idw, .dwg).
6 | Chapter 1 Digital Prototypes in Autodesk Inventor