DGN

DGN is a CAD design file format used by MicroStation and some other software. It competes with DWG from Autodesk. There is a standardized version to specs from Intergraph (part of their Intergraph Standard File Formats), but also a variant (V8 DGN) from Bentley Systems, makers of MicroStation.

Specs

 * Intergraph standard file formats

Format Information
Early versions up to V7 DGN of DGN format are binary formats, V8 was changed to be a an "OLE2" document container format.

Software

 * Bentley View free edition; will view these files

Links

 * MicroStation Official site
 * Educational module on creating/using these files
 * MicroStation reviews and pricing
 * Wikipedia article: DGN
 * Wikipedia article: MicroStation