Embodiments of the invention provide data file interoperability between two drawing programs using a single composite drawing file. A method of generating a drawing file shared by a source application and a target application includes storing a copy of a computer aided design (CAD) drawing in a composite drawing file, where the CAD drawing is stored according to a drawing format used by the source application. The method also includes generating a visual representation of the CAD drawing, where the visual representation is formatted according to a drawing format used by the target application. The method also includes storing the visual representation in the composite drawing file, where a display of the visual representation generated by the target application is substantially similar to a display of the CAD drawing generated by the source application.