Hello folks, anyone can help me find: 1. SDK to read or write DGN files 2. DGN file structure or specification, newer than the one available at [URL]http://www.wotsit.org[/URL] A specification for DGN version 4 and higher, version 7 for example or 8 if available. 3. Applications that read and write DGN files 4. Sample DGN files