The DXF/DWG file format is often used as an exchange format between CAD systems. The geometry obtained as a result of exporting from different CAD packages to DXF/DWG often contains broken geometry constraints (i.e., tangent, horizontal, vertical constraints, gaps between points, or overlapping entities). Broken constraints create problems in modeling and manufacturing processes, but it is very difficult to identify all problematic areas manually.
Reasons why geometric relations can be violated during data translation include, among others:
Autodesk® AutoCAD® 2015 has Parametric Drawing tools. Parametric drawing is a technology that is used for designing with constrained objects. Constrained objects are associations and restrictions that are applied to 2D geometric objects. Usage of Parametric Constraints could help ensure accuracy of the original design as well as simplify subsequent design modifications.
The Drawing Diagnostics inspects drawings for violated constraints, and offers engineers the capability to quickly identify problematic areas and propose solutions. It also demonstrates capabilities for suggesting and creating new constraints for the entities that were not originally constrained.
Supported Constraints and Geometric Relations: