http://gicl.cs.drexel.edu/wiki-data/index.php?title=DGN&feed=atom&action=history 2013-06-19T00:08:55Z Revision history for this page on the wiki MediaWiki 1.18.2 http://gicl.cs.drexel.edu/wiki-data/index.php?title=DGN&diff=20846&oldid=prev 2008-06-24T18:28:37Z

<p></p> <p><b>New page</b></p><div>:''This article is about the computer file format. For the Illinois high school, see [[Downers Grove North]].''<br /> <br /> '''DGN''' ('''Design''') is the name used for CAD [[file format]]s supported by [[Bentley Systems]]' [[MicroStation]] and [[Intergraph]]'s [[Interactive Graphics Design System]] (IGDS) CAD programs.<br /> <br /> There are two versions of DGN:<br /> <br /> *Up until 2000, all DGN files were based on the [[Intergraph Standard File Format]] (ISFF) specification, published in the late 1980s by Intergraph. Sometimes referred to as V7 DGN, or Intergraph DGN.<br /> <br /> *In 2000, Bentley Systems created an updated version of DGN which includes a superset of DGN's capabilities, but which has a different internal data structure than the ISFF-based DGN. This version is properly referred to as '''[[V8 DGN]]'''.<br /> <br /> Although DGN is not as widely-used as Autodesk's [[AutoCAD DWG|DWG]], it is nevertheless mission critical in many large projects, including buildings, highways, bridges, process plants, shipbuilding. <br /> <br /> <br /> ==External links==<br /> *[http://www.bentley.com/opendgn OpenDGN] - Bentley's OpenDGN initiative<br /> *[http://dl.maptools.org/dl/dgnlib/ref18.pdf Microstation 95/ISFF Description (pdf)] - Information on the ISFF/DGN file format as distributed with Microstation 95.<br /> *[http://dgnlib.maptools.org/dgn.html ISFF Specification] - Intergraph Standard File Formats (Element Structure)<br /> *[http://dgnlib.maptools.org DGNLib] - DGNLib: a free Microstation DGN (ISFF) program library<br /> *[http://www.opendesign.com DGNdirect] - DGNdirect, from [[Open Design Alliance]]: a V8/V7 DGN program library.</div>

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